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Replacing SIFT by FREAK

asked 2012-09-17 05:35:07 -0500

jav_rock gravatar image

updated 2012-09-17 05:35:27 -0500

I have an application using FAST detector and SIFT descriptors. I want to try the new FREAK descriptor.

  • Is it enough by replacing SIFT functions by FREAK and keep using FAST detector or do I need to apply major changes?
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Hi, I would like to know if you could share your experience. Which combination was the best? As far as I know SIFT detector rejects corners because the SIFT descriptor works better with blobs. Then the performance of SIFT detector + SIFT descriptor is higher than FAST + SIFT descriptor.

RaulPL gravatar imageRaulPL ( 2013-05-16 20:07:13 -0500 )edit

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answered 2012-09-17 12:12:11 -0500

Cachalote gravatar image

Yes. You just need to detect keypoints with FAST and call FREAK like this:

FREAK extractor;
extractor.compute(image, keypoints, descriptors);

It is similar to this demo.

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answered 2012-09-18 08:58:08 -0500

Piperoman gravatar image

FREAK is only a descriptor extractor, so, you need first to detect points. You must use FAST corner detector.

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Asked: 2012-09-17 05:35:07 -0500

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Last updated: Sep 18 '12