# \#surf

**URL:** https://forum.opencv.org/tag/surf/204.md

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## [Is it allowded to use SURF for commercial use?](https://forum.opencv.org/t/is-it-allowded-to-use-surf-for-commercial-use/16731)

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**Author:** [@vps](https://forum.opencv.org/u/vps)\
**Replies:** 0\
**Last updated:** [March 7, 2024, 8:18am UTC](https://forum.opencv.org/t/is-it-allowded-to-use-surf-for-commercial-use/16731 "2024-03-07T08:18:40Z")

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Hi All, I am using opencv 4.9 library. I want to use surf algorithm for feature extraction. Is it possible to use it for commerical use.

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## [SURF\_CUDA performance](https://forum.opencv.org/t/surf-cuda-performance/10395)

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**Author:** [@Helios](https://forum.opencv.org/u/Helios)\
**Replies:** 8\
**Last updated:** [October 6, 2022, 6:08am UTC](https://forum.opencv.org/t/surf-cuda-performance/10395 "2022-10-06T06:08:25Z")

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I’m extracting features with SURF\_CUDA, and I’m not getting the speed improvements I was hoping for, compared to just using the CPU. I’m using a 16-core/32-thread 3950X and an RTX 3070. The CPU can crunch ~60 Mpx/s, whil…

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## [SURF GPU with FLANN?](https://forum.opencv.org/t/surf-gpu-with-flann/3109)

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**Author:** [@PommePomme](https://forum.opencv.org/u/PommePomme)\
**Replies:** 15\
**Last updated:** [May 4, 2021, 11:34am UTC](https://forum.opencv.org/t/surf-gpu-with-flann/3109 "2021-05-04T11:34:00Z")

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Hi all, I am currently using SURF with the FLANN descriptor, and I would like to test SURF in its GPU version. But I don’t find any informations about FLANN with SURF GPU. Since FLANN use the descriptors function “dete…

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## [FlannBasedMatcher parameters explanations ? for camera tampering](https://forum.opencv.org/t/flannbasedmatcher-parameters-explanations-for-camera-tampering/2915)

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**Author:** [@PommePomme](https://forum.opencv.org/u/PommePomme)\
**Replies:** 12\
**Last updated:** [April 23, 2021, 6:45am UTC](https://forum.opencv.org/t/flannbasedmatcher-parameters-explanations-for-camera-tampering/2915 "2021-04-23T06:45:05Z")

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Hi there, I attempt to compare two images with SURF and FLANN. The first image is basically the first frame captured of a camera when you run the app. The other image change at every frame since it is a video stream. So…