openmv/lib/imlib/fast.c
iabdalkader 4ded9fba91 common: Remove xalloc.
Originally meant to abstract gc_collect but we could just use
m_alloc and friends. Also was meant to provide functions like
alloc0, alloc_maybe etc.. which are all available in MP anyway.

Signed-off-by: iabdalkader <i.abdalkader@gmail.com>
2025-06-27 14:50:16 +02:00

6081 lines
203 KiB
C

/*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2006, 2008, 2009, 2010 Edward Rosten
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University of Cambridge nor the names of
* its contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
* TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*
* NOTE: This code is mostly auto-generated.
* See https://www.edwardrosten.com/work/fast.html
*/
#include <stdio.h>
#include "imlib.h"
#include "fb_alloc.h"
#include "gc.h"
#ifdef IMLIB_ENABLE_FAST
#define MIN_MEM (10 * 1024)
#define MAX_CORNERS (2000U)
#define Compare(X, Y) ((X) >= (Y))
typedef struct {
uint16_t x;
uint16_t y;
uint16_t score;
} corner_t;
static int pixel[16];
static corner_t *fast9_detect(image_t *image, rectangle_t *roi, int *n_corners, int b);
static void fast9_score(image_t *image, corner_t *corners, int num_corners, int b);
static void nonmax_suppression(corner_t *corners, int num_corners, array_t *keypoints);
static kp_t *alloc_keypoint(uint16_t x, uint16_t y, uint16_t score) {
// Note must set keypoint descriptor to zeros
kp_t *kpt = m_malloc0(sizeof *kpt);
kpt->x = x;
kpt->y = y;
kpt->score = score;
return kpt;
}
static void make_offsets(int pixel[], int row_stride) {
pixel[0] = 0 + row_stride * 3;
pixel[1] = 1 + row_stride * 3;
pixel[2] = 2 + row_stride * 2;
pixel[3] = 3 + row_stride * 1;
pixel[4] = 3 + row_stride * 0;
pixel[5] = 3 + row_stride * -1;
pixel[6] = 2 + row_stride * -2;
pixel[7] = 1 + row_stride * -3;
pixel[8] = 0 + row_stride * -3;
pixel[9] = -1 + row_stride * -3;
pixel[10] = -2 + row_stride * -2;
pixel[11] = -3 + row_stride * -1;
pixel[12] = -3 + row_stride * 0;
pixel[13] = -3 + row_stride * 1;
pixel[14] = -2 + row_stride * 2;
pixel[15] = -1 + row_stride * 3;
}
void fast_detect(image_t *image, array_t *keypoints, int threshold, rectangle_t *roi) {
int num_corners = 0;
make_offsets(pixel, image->w);
// Find corners
corner_t *corners = fast9_detect(image, roi, &num_corners, threshold);
if (num_corners) {
// Score corners
fast9_score(image, corners, num_corners, threshold);
// Non-max suppression
nonmax_suppression(corners, num_corners, keypoints);
}
// Free corners;
fb_free();
}
static void nonmax_suppression(corner_t *corners, int num_corners, array_t *keypoints) {
gc_info_t info;
int last_row;
int16_t *row_start;
const int sz = num_corners;
/* Point above points (roughly) to the pixel above
the one of interest, if there is a feature there.*/
int point_above = 0;
int point_below = 0;
/* Find where each row begins (the corners are output in raster scan order).
A beginning of -1 signifies that there are no corners on that row. */
last_row = corners[sz - 1].y;
row_start = fb_alloc((last_row + 1) * sizeof(uint16_t), FB_ALLOC_NO_HINT);
for (int i = 0; i < last_row + 1; i++) {
row_start[i] = -1;
}
for (int i = 0, prev_row = -1; i < sz; i++) {
corner_t *c = &corners[i];
if (c->y != prev_row) {
row_start[c->y] = i;
prev_row = c->y;
}
}
for (int i = 0; i < sz; i++) {
corner_t pos = corners[i];
uint16_t score = pos.score;
/*Check left */
if (i > 0) {
if (corners[i - 1].x == pos.x - 1 && corners[i - 1].y == pos.y && Compare(corners[i - 1].score, score)) {
goto nonmax;
}
}
/*Check right*/
if (i < (sz - 1)) {
if (corners[i + 1].x == pos.x + 1 && corners[i + 1].y == pos.y && Compare(corners[i + 1].score, score)) {
goto nonmax;
}
}
/*Check above (if there is a valid row above)*/
if (pos.y != 0 && row_start[pos.y - 1] != -1) {
/*Make sure that current point_above is one row above.*/
if (corners[point_above].y < pos.y - 1) {
point_above = row_start[pos.y - 1];
}
/*Make point_above point to the first of the pixels above the current point, if it exists.*/
for (; corners[point_above].y < pos.y && corners[point_above].x < pos.x - 1; point_above++) {
}
for (int j = point_above; corners[j].y < pos.y && corners[j].x <= pos.x + 1; j++) {
int x = corners[j].x;
if ( (x == pos.x - 1 || x == pos.x || x == pos.x + 1) && Compare(corners[j].score, score)) {
goto nonmax;
}
}
}
/*Check below (if there is anything below)*/
if (pos.y != last_row && row_start[pos.y + 1] != -1 && point_below < sz) {
/*Nothing below*/
if (corners[point_below].y < pos.y + 1) {
point_below = row_start[pos.y + 1];
}
/* Make point below point to one of the pixels belowthe current point, if it exists.*/
for (; point_below < sz && corners[point_below].y == pos.y + 1 && corners[point_below].x < pos.x - 1;
point_below++) {
}
for (int j = point_below; j < sz && corners[j].y == pos.y + 1 && corners[j].x <= pos.x + 1; j++) {
int x = corners[j].x;
if ( (x == pos.x - 1 || x == pos.x || x == pos.x + 1) && Compare(corners[j].score, score)) {
goto nonmax;
}
}
}
gc_info(&info);
// Allocate keypoints until we're almost out of memory
if (info.free < MIN_MEM) {
// Try collecting memory
gc_collect();
// If it didn't work break
gc_info(&info);
if (info.free < MIN_MEM) {
break;
}
}
array_push_back(keypoints, alloc_keypoint(pos.x, pos.y, pos.score));
nonmax:
;
}
// Free temp rows.
fb_free();
}
// *INDENT-OFF*
static int fast9_corner_score(const uint8_t *p, int bstart)
{
int bmin = bstart;
int bmax = 255;
int b = (bmax + bmin)/2;
/*Compute the score using binary search*/
for(;;)
{
int cb = *p + b;
int c_b= *p - b;
if( p[pixel[0]] > cb)
if( p[pixel[1]] > cb)
if( p[pixel[2]] > cb)
if( p[pixel[3]] > cb)
if( p[pixel[4]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
goto is_a_corner;
else
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[7]] < c_b)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[14]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[6]] < c_b)
if( p[pixel[15]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[13]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[14]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[13]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[5]] < c_b)
if( p[pixel[14]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[12]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[13]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[14]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[6]] < c_b)
goto is_a_corner;
else
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[12]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[6]] < c_b)
goto is_a_corner;
else
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[4]] < c_b)
if( p[pixel[13]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[11]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[12]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[13]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[5]] < c_b)
goto is_a_corner;
else
if( p[pixel[14]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[11]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[5]] < c_b)
goto is_a_corner;
else
if( p[pixel[14]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[3]] < c_b)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[4]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[10]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[4]] < c_b)
goto is_a_corner;
else
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[4]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[10]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[4]] < c_b)
goto is_a_corner;
else
if( p[pixel[13]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[2]] < c_b)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[4]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[3]] > cb)
if( p[pixel[4]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[9]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[4]] < c_b)
if( p[pixel[3]] < c_b)
goto is_a_corner;
else
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[4]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[3]] > cb)
if( p[pixel[4]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[9]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[4]] < c_b)
if( p[pixel[3]] < c_b)
goto is_a_corner;
else
if( p[pixel[12]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[1]] < c_b)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[4]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[3]] > cb)
if( p[pixel[4]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[2]] > cb)
if( p[pixel[3]] > cb)
if( p[pixel[4]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[8]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[4]] < c_b)
if( p[pixel[3]] < c_b)
if( p[pixel[2]] < c_b)
goto is_a_corner;
else
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[4]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[3]] > cb)
if( p[pixel[4]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[2]] > cb)
if( p[pixel[3]] > cb)
if( p[pixel[4]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[8]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[4]] < c_b)
if( p[pixel[3]] < c_b)
if( p[pixel[2]] < c_b)
goto is_a_corner;
else
if( p[pixel[11]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[0]] < c_b)
if( p[pixel[1]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[4]] > cb)
if( p[pixel[3]] > cb)
if( p[pixel[2]] > cb)
goto is_a_corner;
else
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[4]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[3]] < c_b)
if( p[pixel[4]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[2]] < c_b)
if( p[pixel[3]] < c_b)
if( p[pixel[4]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[1]] < c_b)
if( p[pixel[2]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[4]] > cb)
if( p[pixel[3]] > cb)
goto is_a_corner;
else
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[4]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[3]] < c_b)
if( p[pixel[4]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[2]] < c_b)
if( p[pixel[3]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[4]] > cb)
goto is_a_corner;
else
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[4]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[3]] < c_b)
if( p[pixel[4]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[5]] > cb)
goto is_a_corner;
else
if( p[pixel[14]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[13]] < c_b)
if( p[pixel[11]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[12]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[4]] < c_b)
if( p[pixel[5]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[6]] > cb)
goto is_a_corner;
else
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[14]] < c_b)
if( p[pixel[12]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[13]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[6]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[5]] < c_b)
if( p[pixel[6]] > cb)
if( p[pixel[15]] < c_b)
if( p[pixel[13]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[14]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[6]] < c_b)
if( p[pixel[7]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
goto is_a_corner;
else
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[13]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[12]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[6]] > cb)
goto is_a_corner;
else
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[5]] > cb)
goto is_a_corner;
else
if( p[pixel[14]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[4]] > cb)
goto is_a_corner;
else
if( p[pixel[13]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[4]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[9]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[4]] > cb)
if( p[pixel[3]] > cb)
goto is_a_corner;
else
if( p[pixel[12]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[4]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[3]] < c_b)
if( p[pixel[4]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[8]] > cb)
if( p[pixel[7]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[10]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[4]] > cb)
if( p[pixel[3]] > cb)
if( p[pixel[2]] > cb)
goto is_a_corner;
else
if( p[pixel[11]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[4]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[3]] < c_b)
if( p[pixel[4]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[2]] < c_b)
if( p[pixel[3]] < c_b)
if( p[pixel[4]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[7]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[7]] > cb)
if( p[pixel[8]] > cb)
if( p[pixel[9]] > cb)
if( p[pixel[6]] > cb)
if( p[pixel[5]] > cb)
if( p[pixel[4]] > cb)
if( p[pixel[3]] > cb)
if( p[pixel[2]] > cb)
if( p[pixel[1]] > cb)
goto is_a_corner;
else
if( p[pixel[10]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] > cb)
if( p[pixel[11]] > cb)
if( p[pixel[12]] > cb)
if( p[pixel[13]] > cb)
if( p[pixel[14]] > cb)
if( p[pixel[15]] > cb)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else if( p[pixel[7]] < c_b)
if( p[pixel[8]] < c_b)
if( p[pixel[9]] < c_b)
if( p[pixel[6]] < c_b)
if( p[pixel[5]] < c_b)
if( p[pixel[4]] < c_b)
if( p[pixel[3]] < c_b)
if( p[pixel[2]] < c_b)
if( p[pixel[1]] < c_b)
goto is_a_corner;
else
if( p[pixel[10]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
if( p[pixel[10]] < c_b)
if( p[pixel[11]] < c_b)
if( p[pixel[12]] < c_b)
if( p[pixel[13]] < c_b)
if( p[pixel[14]] < c_b)
if( p[pixel[15]] < c_b)
goto is_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
else
goto is_not_a_corner;
is_a_corner:
bmin=b;
goto end_if;
is_not_a_corner:
bmax=b;
goto end_if;
end_if:
if(bmin == bmax - 1 || bmin == bmax)
return bmin;
b = (bmin + bmax) / 2;
}
}
// *INDENT-ON*
static void fast9_score(image_t *image, corner_t *corners, int num_corners, int b) {
for (int i = 0; i < num_corners; i++) {
corner_t *c = &corners[i];
c->score = fast9_corner_score(image->pixels + c->y * image->w + c->x, b);
}
}
// *INDENT-OFF*
static corner_t *fast9_detect(image_t *image, rectangle_t *roi, int *n_corners, int b)
{
int num_corners = 0;
// Try to alloc MAX_CORNERS or the actual max corners we can alloc.
int max_corners = IM_MIN(MAX_CORNERS, (fb_avail() / sizeof(corner_t)));
corner_t *corners = (corner_t*) fb_alloc(max_corners * sizeof(corner_t), FB_ALLOC_NO_HINT);
for(int y=roi->y+3; y<roi->y+roi->h-3; y++) {
for(int x=roi->x+3; x<roi->x+roi->w-3; x++) {
const uint8_t *p = image->pixels+(y * image->w + x);
int cb = *p + b;
int c_b= *p - b;
if(p[pixel[0]] > cb)
if(p[pixel[1]] > cb)
if(p[pixel[2]] > cb)
if(p[pixel[3]] > cb)
if(p[pixel[4]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
{}
else
if(p[pixel[15]] > cb)
{}
else
continue;
else if(p[pixel[7]] < c_b)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
continue;
else if(p[pixel[14]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else if(p[pixel[6]] < c_b)
if(p[pixel[15]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
{}
else
continue;
else if(p[pixel[13]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[14]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else if(p[pixel[13]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[5]] < c_b)
if(p[pixel[14]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[15]] > cb)
{}
else
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[12]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[13]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[14]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[6]] < c_b)
{}
else
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[12]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[6]] < c_b)
{}
else
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[4]] < c_b)
if(p[pixel[13]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[11]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[12]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[13]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[5]] < c_b)
{}
else
if(p[pixel[14]] < c_b)
{}
else
continue;
else
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[11]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[5]] < c_b)
{}
else
if(p[pixel[14]] < c_b)
{}
else
continue;
else
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[3]] < c_b)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[4]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[10]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[4]] < c_b)
{}
else
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
{}
else
continue;
else
continue;
else
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[4]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[10]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[4]] < c_b)
{}
else
if(p[pixel[13]] < c_b)
{}
else
continue;
else
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
{}
else
continue;
else
continue;
else
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[2]] < c_b)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[4]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[3]] > cb)
if(p[pixel[4]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[9]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[4]] < c_b)
if(p[pixel[3]] < c_b)
{}
else
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
{}
else
continue;
else
continue;
else
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[4]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[3]] > cb)
if(p[pixel[4]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[9]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[4]] < c_b)
if(p[pixel[3]] < c_b)
{}
else
if(p[pixel[12]] < c_b)
{}
else
continue;
else
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
{}
else
continue;
else
continue;
else
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[1]] < c_b)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
{}
else
continue;
else
continue;
else
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[4]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[3]] > cb)
if(p[pixel[4]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[2]] > cb)
if(p[pixel[3]] > cb)
if(p[pixel[4]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[8]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[4]] < c_b)
if(p[pixel[3]] < c_b)
if(p[pixel[2]] < c_b)
{}
else
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
{}
else
continue;
else
continue;
else
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
{}
else
continue;
else
continue;
else
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[4]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[3]] > cb)
if(p[pixel[4]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[2]] > cb)
if(p[pixel[3]] > cb)
if(p[pixel[4]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[8]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[4]] < c_b)
if(p[pixel[3]] < c_b)
if(p[pixel[2]] < c_b)
{}
else
if(p[pixel[11]] < c_b)
{}
else
continue;
else
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
{}
else
continue;
else
continue;
else
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[0]] < c_b)
if(p[pixel[1]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[4]] > cb)
if(p[pixel[3]] > cb)
if(p[pixel[2]] > cb)
{}
else
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
{}
else
continue;
else
continue;
else
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
{}
else
continue;
else
continue;
else
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[4]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[3]] < c_b)
if(p[pixel[4]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[2]] < c_b)
if(p[pixel[3]] < c_b)
if(p[pixel[4]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[1]] < c_b)
if(p[pixel[2]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[4]] > cb)
if(p[pixel[3]] > cb)
{}
else
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
{}
else
continue;
else
continue;
else
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[4]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[3]] < c_b)
if(p[pixel[4]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[2]] < c_b)
if(p[pixel[3]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[4]] > cb)
{}
else
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
{}
else
continue;
else
continue;
else
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[4]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[3]] < c_b)
if(p[pixel[4]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[5]] > cb)
{}
else
if(p[pixel[14]] > cb)
{}
else
continue;
else
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[13]] < c_b)
if(p[pixel[11]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[12]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[5]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[4]] < c_b)
if(p[pixel[5]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[6]] > cb)
{}
else
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[14]] < c_b)
if(p[pixel[12]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[13]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[6]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[5]] < c_b)
if(p[pixel[6]] > cb)
if(p[pixel[15]] < c_b)
if(p[pixel[13]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[14]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
{}
else
continue;
else
continue;
else
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[6]] < c_b)
if(p[pixel[7]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
{}
else
if(p[pixel[15]] < c_b)
{}
else
continue;
else
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
if(p[pixel[13]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[12]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[6]] > cb)
{}
else
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[11]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[5]] > cb)
{}
else
if(p[pixel[14]] > cb)
{}
else
continue;
else
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[10]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[4]] > cb)
{}
else
if(p[pixel[13]] > cb)
{}
else
continue;
else
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
{}
else
continue;
else
continue;
else
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[4]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[9]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[4]] > cb)
if(p[pixel[3]] > cb)
{}
else
if(p[pixel[12]] > cb)
{}
else
continue;
else
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
{}
else
continue;
else
continue;
else
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[4]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[3]] < c_b)
if(p[pixel[4]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[8]] > cb)
if(p[pixel[7]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[10]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[4]] > cb)
if(p[pixel[3]] > cb)
if(p[pixel[2]] > cb)
{}
else
if(p[pixel[11]] > cb)
{}
else
continue;
else
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
{}
else
continue;
else
continue;
else
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
{}
else
continue;
else
continue;
else
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[4]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[3]] < c_b)
if(p[pixel[4]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[2]] < c_b)
if(p[pixel[3]] < c_b)
if(p[pixel[4]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[7]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[7]] > cb)
if(p[pixel[8]] > cb)
if(p[pixel[9]] > cb)
if(p[pixel[6]] > cb)
if(p[pixel[5]] > cb)
if(p[pixel[4]] > cb)
if(p[pixel[3]] > cb)
if(p[pixel[2]] > cb)
if(p[pixel[1]] > cb)
{}
else
if(p[pixel[10]] > cb)
{}
else
continue;
else
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
{}
else
continue;
else
continue;
else
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[10]] > cb)
if(p[pixel[11]] > cb)
if(p[pixel[12]] > cb)
if(p[pixel[13]] > cb)
if(p[pixel[14]] > cb)
if(p[pixel[15]] > cb)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else if(p[pixel[7]] < c_b)
if(p[pixel[8]] < c_b)
if(p[pixel[9]] < c_b)
if(p[pixel[6]] < c_b)
if(p[pixel[5]] < c_b)
if(p[pixel[4]] < c_b)
if(p[pixel[3]] < c_b)
if(p[pixel[2]] < c_b)
if(p[pixel[1]] < c_b)
{}
else
if(p[pixel[10]] < c_b)
{}
else
continue;
else
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
{}
else
continue;
else
continue;
else
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
if(p[pixel[10]] < c_b)
if(p[pixel[11]] < c_b)
if(p[pixel[12]] < c_b)
if(p[pixel[13]] < c_b)
if(p[pixel[14]] < c_b)
if(p[pixel[15]] < c_b)
{}
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
else
continue;
// Add corner
corners[num_corners].x = x;
corners[num_corners].y = y;
if (++num_corners == max_corners) {
goto done;
}
}
}
done:
*n_corners = num_corners;
return corners;
}
// *INDENT-ON*
#endif //IMLIB_ENABLE_FAST