from PIL import Image as image foreground = image.open("donkey.png")background = image.open( "back.jpg" )alpha = image.open( "donkeyAlpha.png" )outImage = image.composite( foreground, background, alpha )outImage.save( "./pilblend.png" )

 

 

import cv2foreground = cv2.imread("donkey.png")background = cv2.imread("back.jpg")alpha = cv2.imread("donkeyAlpha.png")# Convert uint8 to floatforeground = foreground.astype(float)background = background.astype(float)# Normalize the alpha mask to keep intensity between 0 and 1alpha = alpha.astype(float)/255foreground = cv2.multiply(alpha, foreground)background = cv2.multiply(1.0 - alpha, background)outImage = cv2.add(foreground, background)cv2.imwrite( "./cv2blend.png"  ,outImage )