Python return a modified image using Flask

Hello there!

I would like to build a small webservice that receives as input two images and a blending mode option and gives back a modified image.

I've written the blend_image part but now I can't think about how to get the modified image back to the browser...

Any ideas?

from flask import Flask
app = Flask(__name__)

import Image
import ImageChops

def hello():
    return "Welcome to my app :)"

    modified_image = blend_image("image1.jpg", "image2.jpg", "lighten")
    return "how can I return modified image?"

def blend_image (img1, img2, method):
    img1 =;
    img2 =;
    if (method == "lighter"):
        return ImageChops.lighter(img1, img2)
    elif (method == "darker"):
        ImageChops.darker(img1, img2).show()
    elif (method == "difference"):
        ImageChops.difference(img1, img2).show()
    elif (method == "multiply"):
        ImageChops.multiply(img1, img2).show()
    elif (method == "screen"):
        ImageChops.screen(img1, img2).show()

if (__name__ =="__main__"):

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Kyle HamiltonData ScientistCommented:
have you tried

return modified_image

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(in place of your string)

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ltpittAuthor Commented:
Easy as pie!

return ImageChops.screen(img1, img2)

Simply fantastic :)
Kyle HamiltonData ScientistCommented:
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