两张图像做简单直接的融合（blend）

from PIL import Image

def blend_images(floder, img1_name, img2_name, alpha=0.5):
    img1 = img1_name  # './img1.png'
    img1 = Image.open(img1)
    img1 = img1.convert('RGBA')

    img2 = img2_name  # './img2.png'
    img2 = Image.open(img2)
    img2 = img2.convert('RGBA')

    img = Image.blend(img1, img2, alpha)
    img.save('out.png')