background_color = np.array([255, 255, 255], dtype=np.uint8)

foreground = image != background_color

foreground = np.zeros(shape=(height, width, 1), dtype=np.bool)
    for y in range(height):
        for x in range(width):
            if not np.array_equal(image[y, x], background_color):
                foreground[y, x] = True