April 2017
Beginner to intermediate
250 pages
6h 28m
English
Content preview from Mastering OpenCV 3 - Second Edition
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Choosing the image pair to use first
Given we have more than just two image views of the scene, we must choose which two views we will start the reconstruction from. In their paper, Snavely et al. suggest to picking the two views that have the least number of homography inliers. A homography is a relationship between two images or sets of points that lie on a plane; the homography matrix defines the transformation from one plane to another. In case of an image or a set of 2D points, the homography matrix is of size 3x3.
When Snavely et al. look for the lowest inlier ratio, they essentially suggest that you calculate the homography matrix between all pairs of images and pick the pair whose points mostly do not correspond with the homography ...
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