In affine transformation, all parallel lines in the original image will still be parallel in the output image. To find the transformation matrix, we need three points from the input image and their corresponding locations in the output image. Then cv.getAffineTransform will create a 2x3 matrix which is to be passed to cv.warpAffine.
Check the below example, and also look at the points I selected (which are marked in green color)
Code
Display the result of the example
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