# 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())