ｐｙｔｈｏｎ ｃｖ２ 利用掩膜将图片透明背景

保留掩膜白色部分，将黑色部分变为透明：

import PIL.Image as Image
import os

imgfolder= './img-ds/'
maskfolder = './mask-ds'

output_file = './mergeimg-transparent/'

for imgf in os.listdir(imgfolder):

	imgfile = os.path.join(imgfolder, imgf)
	maskfile = os.path.join(maskfolder, imgf)

	mask = Image.open(maskfile)
	mask = mask.convert('RGBA')

	img = Image.open(imgfile)
	img = img.convert('RGBA')

	W, H = img.size
	white_pixel = (255,255,255,255)

	for h in range(H):
		for w in range(W):
 			
			if mask.getpixel((w,h)) != white_pixel:

				img.putpixel((w,h),(255,255,255,0))
	
	savepath = os.path.join(output_file, imgf)			
	img.save(savepath)

运行代码结果如下图：