補色残像による錯視画像の生成

complementary_afterimage.py

# coding: UTF-8
import sys
from PIL import Image

if __name__ == "__main__":
    filename = sys.argv[1]
    raw_img = Image.open(filename,'r')
    gray_img = raw_img.convert('L')

    size = raw_img.size
    comp_img = Image.new('RGB',size)
    for x in range(size[0]):
        for y in range(size[1]):
            pixel = raw_img.getpixel((x,y))
            sum_max_min = max(pixel) + min(pixel)
            pixel_comp = tuple([sum_max_min - c for c in pixel])
            comp_img.putpixel((x,y),pixel_comp)

    gray_img.save('gray_'+filename)
    comp_img.save("comp_"+filename)