Replacing A Quadrilateral With A Square Generated From Pil.quad

I am working on a computer vision problem involving some basic transformations and could use your help. Input image: Transformed image I understand that we take this quadrilatera

Solution 1:

phew! I figured this out using this helpful answer at Merging perspective corrected image with transparent background template image using PILLOW [PIL, Python]

While you use QUAD to go from quadrilateral to rectangle, you can use perspective to go back from rectangle to quadrilateral

#!/usr/bin/env python3from itertools import chain
from wand.color import Color
from wand.image import Image

with Image(filename='image2') as cover, Image(filename='image3') as template:
    w, h = cover.size
    cover.virtual_pixel = 'transparent'
    source_points = (
        (0, 0),
        (w, 0),
        (w, h),
        (0, h)
    )
    destination_points = (
        (628+78.37203406,  35.24937345),
        (628+577.65062655,  62.72203406),
        (628+550.17796594, 562.00062655),
        (628+50.89937345, 534.52796594)
    )
    order = chain.from_iterable(zip(source_points, destination_points))
    arguments = list(chain.from_iterable(order))
    cover.distort('perspective', arguments)

    # Overlay cover onto template and save
    template.composite(cover,left=0,top=0)
    template.save(filename='result.png')