画像を赤くする処理(OpenCV version)

cvconvertcolor.py

from PIL import Image
import sys

args = sys.argv
argc = len(args)

files = args[1:argc]

def convert_img(file):
    img = Image.open(file)
    size = img.size
    for x in range(size[0]):
        for y in range(size[1]):
            r,g,b,a = img.getpixel((x,y))
            r = int((r + 255) / 2)
            g = int(g * 0.5)
            b = int(b * 0.5)
            img.putpixel((x,y),(r,g,b,a))
    img.save(file,compress_level=9)

for file in files:
    convert_img(file)