[cv2/PIL] png 이미지 jpg로 변경

png중 배경이 투명한 이미지를 jpg처럼 흰 배경을 추가한 후, 변환

 

PIL Image 활용

image = Image.open("test.png").convert("RGBA")
new_image = Image.new("RGBA", image.size, "WHITE")
new_image.paste(image, mask=image)

new_image.convert("RGB").save("test.jpg")

 

 

cv2 활용

import cv2
#load image with alpha channel.  use IMREAD_UNCHANGED to ensure loading of alpha channel
image = cv2.imread('your image', cv2.IMREAD_UNCHANGED)    

#make mask of where the transparent bits are
trans_mask = image[:,:,3] == 0

#replace areas of transparency with white and not transparent
image[trans_mask] = [255, 255, 255, 255]

#new image without alpha channel...
new_img = cv2.cvtColor(image, cv2.COLOR_BGRA2BGR)