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How findHomography works?

asked 2012-09-30 17:51:30 -0500

yes123 gravatar image

Hello,

is there any simple (and mathematical) explanation on how cvFindHomography and RANSAC work internally?

Thanks

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answered 2012-10-01 05:11:11 -0500

Hi,

You can find an explanation (with math included) of cvFindHomography at:

Gary Bradsky & Adrian Kaehler, "Learning OpenCV: Computer Vision with the OpenCV Library".
O'Reilly 2008. Chapter 11: Camera Models and Calibration. Page 384.

For the RANSAC algorithm, there must be something else out there, but you can take a look at the original paper:

M.A. Fischler and R.C. Bolles, "Random sample concensus: A paradigm for model fitting with applications to image analysis and automated cartography".
Communications of the Association for Computing Machinery 24 (1981):381-395

Hope this helps

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Thanks +1..

yes123 gravatar imageyes123 ( 2012-10-01 06:28:56 -0500 )edit
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answered 2012-10-01 06:33:56 -0500

yes123 gravatar image

On this page I have found a pretty good explanation of Homography with DLT (but without RANSAC)

http://mmlab.disi.unitn.it/wiki/index.php/2D_Homography:_Algorithm_and_Tool

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Asked: 2012-09-30 17:51:30 -0500

Seen: 671 times

Last updated: Oct 01 '12