mirror of
https://github.com/openmv/openmv.git
synced 2025-09-26 23:09:13 +08:00
91 lines
2.5 KiB
Python
91 lines
2.5 KiB
Python
# This work is licensed under the MIT license.
|
|
# Copyright (c) 2013-2023 OpenMV LLC. All rights reserved.
|
|
# https://github.com/openmv/openmv/blob/master/LICENSE
|
|
#
|
|
# Image Drawing Alpha Table Test
|
|
#
|
|
# This script tests the performance and quality of the draw_image()
|
|
# method which can perform nearest neighbor, bilinear, bicubic, and
|
|
# area scaling along with color channel extraction, alpha blending,
|
|
# color palette application, and alpha palette application.
|
|
|
|
import sensor
|
|
import image
|
|
import time
|
|
|
|
sensor.reset()
|
|
sensor.set_pixformat(sensor.RGB565)
|
|
sensor.set_framesize(sensor.QVGA)
|
|
|
|
hint = image.BICUBIC # image.BILINEAR image.BICUBIC
|
|
|
|
small_img = image.Image(4, 4, sensor.RGB565)
|
|
small_img.set_pixel(0, 0, (0, 0, 127))
|
|
small_img.set_pixel(1, 0, (47, 255, 199))
|
|
small_img.set_pixel(2, 0, (0, 188, 255))
|
|
small_img.set_pixel(3, 0, (0, 0, 127))
|
|
small_img.set_pixel(0, 1, (0, 176, 255))
|
|
small_img.set_pixel(1, 1, (222, 0, 0))
|
|
small_img.set_pixel(2, 1, (50, 255, 195))
|
|
small_img.set_pixel(3, 1, (86, 255, 160))
|
|
small_img.set_pixel(0, 2, (255, 211, 0))
|
|
small_img.set_pixel(1, 2, (83, 255, 163))
|
|
small_img.set_pixel(2, 2, (255, 211, 0))
|
|
small_img.set_pixel(3, 2, (0, 80, 255))
|
|
small_img.set_pixel(0, 3, (255, 118, 0))
|
|
small_img.set_pixel(1, 3, (127, 0, 0))
|
|
small_img.set_pixel(2, 3, (0, 144, 255))
|
|
small_img.set_pixel(3, 3, (50, 255, 195))
|
|
# small_img.to_grayscale()
|
|
# small_img.to_bitmap()
|
|
|
|
big_img = image.Image(128, 128, sensor.RGB565)
|
|
big_img.draw_image(small_img, 0, 0, x_scale=32, y_scale=32, hint=hint)
|
|
# big_img.to_grayscale()
|
|
# big_img.to_bitmap()
|
|
|
|
alpha_lut = image.Image(256, 1, sensor.GRAYSCALE)
|
|
for i in range(256):
|
|
alpha_lut.set_pixel(i, 0, 255 if i > 127 else 0)
|
|
|
|
alpha_div = 1
|
|
alpha_value = 0
|
|
alpha_step = 3
|
|
|
|
x_bounce = sensor.width() // 2
|
|
x_bounce_toggle = 1
|
|
|
|
y_bounce = sensor.height() // 2
|
|
y_bounce_toggle = 1
|
|
|
|
clock = time.clock()
|
|
while True:
|
|
clock.tick()
|
|
|
|
img = sensor.snapshot()
|
|
# img.to_grayscale()
|
|
# img.to_bitmap()
|
|
img.draw_image(
|
|
big_img,
|
|
x_bounce,
|
|
y_bounce,
|
|
rgb_channel=-1,
|
|
alpha=alpha_value // alpha_div,
|
|
alpha_palette=alpha_lut,
|
|
hint=hint
|
|
)
|
|
|
|
x_bounce += x_bounce_toggle
|
|
if abs(x_bounce - (img.width() // 2)) >= (img.width() // 2):
|
|
x_bounce_toggle = -x_bounce_toggle
|
|
|
|
y_bounce += y_bounce_toggle
|
|
if abs(y_bounce - (img.height() // 2)) >= (img.height() // 2):
|
|
y_bounce_toggle = -y_bounce_toggle
|
|
|
|
alpha_value += alpha_step
|
|
if not alpha_value or alpha_value // alpha_div >= 255:
|
|
alpha_step = -alpha_step
|
|
|
|
print(clock.fps())
|