When it comes to blending of 2 images, the simplest way is to construct a Laplacian pyramid, and then choose an alpha ratio to sum the images at all the levels. But the resulting image would have color disparity and unnatural boundaries. However by introducing the Laplace operator and a linear system to solve for the desired image, the artifacts are much reduced.
Image to paste to:
Image to cut from:
After computation:
Mor results:
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