Hands-On Image Processing with Python

Blending images with pyramids

Let's say we have a couple of RGB color input images, A (apple) and B (orange), and a third binary mask image, M; all three images are of the same size. The objective is to blend image A with B, guided by the mask, M (if a pixel in the mask image M has a value of 1, it implies that this pixel is be taken from the image A, otherwise from image B). The following algorithm can be used to blend two images using the Laplacian pyramids of images A and B (by computing the blended pyramid using the linear combination of the images at the same levels of the Laplacian pyramids from A and B, with the weights from the same level of the Gaussian pyramid of the mask image M), followed by reconstructing the output image from ...