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Sift / Surf / ORB choice of keypoints

asked 2016-12-22 09:34:06 -0500


i would like to ask how exactly are the keypoints from each of the algorithms chosen. I ran some tests and the first keypoint i get from each algorithm even the first 10 are always the same(for each run of the algorithms, not same for all algorithms). And yet those points does not contain the best size or response of the keypoints.

Thanks in advanced.

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answered 2016-12-22 11:33:04 -0500

Tetragramm gravatar image

Take a look at the code HERE. That's ORB, the others probably work just about the same way.

The short of it is, It doesn't sort the list. It uses nth_element to partially sort. Saves time, still gives a good result.

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Asked: 2016-12-22 09:34:06 -0500

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Last updated: Dec 22 '16