April 2020
Intermediate to advanced
438 pages
12h 2m
English
Content preview from Python Image Processing Cookbook
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Applying perspective transformation and homography
The goal of perspective (projective) transform is to estimate homography (a matrix, H) from point correspondences between two images. Since the matrix has a Depth Of Field (DOF) of eight, you need at least four pairs of points to compute the homography matrix from two images. The following diagram shows the basic concepts required to compute the homography matrix:
Fortunately, we don't need to compute the SVD and the H matrix is computed automatically by the ProjectiveTransform function from the scikit-image transform module. In this recipe, we will use this function to implement homography. ...
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