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how works bruteforcematcher?

asked 2013-07-25 05:25:48 -0500

McBodik gravatar image

Hi. I can't find any information how bf and other matchers works. Can you help?

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answered 2013-07-25 06:42:30 -0500

Nyenna gravatar image

updated 2013-07-25 10:43:12 -0500

You can compute the distance between two descriptors according to different metrics (e.g. L2 distance for floating-point descriptors). The smaller the distance, the more similar the matching.

Assuming that you use the bruteforce matcher to match the descriptors from one image (called the "query" image to another image (the "train" image), here is what it does:

For each descriptor of the query image, compute the distance to each descriptor of the train image and keep the smallest one.

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answered 2013-07-25 05:42:18 -0500

Notas gravatar image

See this. It's to find the matches from keypoint descriptions by brute-force comparing the descriptions in the first set to the ones in the second set.

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I saw that. I want to know how it work, no what its do. e.g "this matcher finds the closest descriptor in the second set by trying each one" how it finds closest?

McBodik gravatar imageMcBodik ( 2013-07-25 05:54:11 -0500 )edit
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Asked: 2013-07-25 05:25:48 -0500

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Last updated: Jul 25 '13