openmv/scripts/examples/02-Image-Processing/00-Drawing/image_drawing_scale_down_test.py

82 lines
2.3 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 Scaling Down Drawing 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.
# DISABLE THE FRAME BUFFER TO SEE THE REAL FPS
import sensor
import image
import time
up_hint = 0 # image.BILINEAR image.BICUBIC
down_hint = image.AREA # image.BILINEAR image.BICUBIC image.AREA
bounce_div = 128
medium_img = image.Image(32, 32, sensor.RGB565, copy_to_fb=True)
# medium_img.to_grayscale()
# medium_img.to_bitmap()
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=up_hint)
# big_img.to_grayscale()
# big_img.to_bitmap()
x_bounce = 0
x_bounce_toggle = 0
y_bounce = 0
y_bounce_toggle = 0
clock = time.clock()
while True:
clock.tick()
medium_img.clear()
medium_img.draw_image(
big_img,
x_bounce // bounce_div,
y_bounce // bounce_div,
x_scale=0.25,
y_scale=0.25,
hint=down_hint,
)
sensor.flush()
x_bounce += x_bounce_toggle
if abs(x_bounce // bounce_div) >= (medium_img.width() * 1.1):
x_bounce_toggle = -x_bounce_toggle
y_bounce += y_bounce_toggle
if abs(y_bounce // bounce_div) >= (medium_img.height() * 1.1):
y_bounce_toggle = -y_bounce_toggle
print(clock.fps())