April 2017
Beginner to intermediate
250 pages
6h 28m
English
Content preview from Mastering OpenCV 3 - Second Edition
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Refinement of the reconstruction
One of the most important parts of an SfM method is refining and optimizing the reconstructed scene, also known as the process of Bundle Adjustment (BA). This is an optimization step where all the data we gathered is fitted to a monolithic model. Both the position of the recovered 3D points and the positions of the cameras are optimized, so re-projection errors are minimized. In other words, recovered 3D points that are re-projected on the image are expected to lie close to the position of originating 2D feature points that generated them. The BA process we use will try to minimize this error for all 3D points together, making for a very big system of simultaneous linear equations with on the order of thousands ...
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