def unittest(data_path, temp_path): import image # Create grayscale image with varying brightness img = image.Image(64, 64, image.GRAYSCALE, copy_to_fb=True) # Create gradient - dark on left, bright on right for y in range(64): for x in range(64): img.set_pixel(x, y, int(x * 4)) # Apply median adaptive threshold img.median(2, threshold=True, offset=5, invert=False) # After adaptive thresholding, should be binary # Verify format is still grayscale (binary thresholding in place) if img.format() != image.GRAYSCALE: return False # Verify output contains only 0 or 255 values (binary) test_pixel = img.get_pixel(32, 32) if test_pixel != 0 and test_pixel != 255: return False return True