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Commit Graph

4 Commits (b66c349bba98a3ff0c6d0339ad277844d1fb5fda)

Author	SHA1	Message	Date
Owen Healy	86fb9f8409	Modify findTransformECC to support a mask of pixels to consider ... Tests of the mask are also included. This is useful for registering a non-square image against a non-square template. This also needs to relax a sanity check as per https://github.com/Itseez/opencv/pull/3851	10 years ago
Owen Healy	ff48387a8a	Fix bug of uninitialized matrix in findTransformECC ... The matrix templateZM needs to be initialized because otherwise uninitialized values leak into the correlation in: const double correlation = templateZM.dot(imageWarped) In the worst case this will lead the correlation to be NaN ruining the whole routine. The subtraction does not initialize templateZM due to the mask. Unfortunately, the uninitialized values (by altering the correlation) have the side effect of dragging out the computation a little longer giving a slightly better error bound. This means that fixing this bug breaks perf_ecc where SANITY_CHECK(warpMat, 1e-3); is just a little too tight and happens to work due to the uninitialized values. Since this is a performance not a accuracy test I think it is OK to just relax the error bound a little bit (the tight error bound being after all the result of a bug).	10 years ago
vbystricky	a13e6ab79f	Fix problem with sanity check of transform ecc with ipp resize	11 years ago
Andrey Kamaev	199a35a105	Move C API of opencv_video to separate file	12 years ago
Georgios Evangelidis	f40725bb50	Add ECC algorithm ... Evangelidis, G.D. and Psarakis E.Z. "Parametric Image Alignment using Enhanced Correlation Coefficient Maximization", IEEE Transactions on PAMI, vol. 32, no. 10, 2008	12 years ago