Why matchfeatures give wrong answer?

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Afsaneh
Afsaneh 2014-9-1
评论： Dima Lisin 2014-9-4
Hi guys,
I have two features vector A=[ 85.8038 57.4149; 144.1727 94.1888; 158.8450 189.1278] and B=[ 87.1281 56.5832; 144.0943 94.7689; 158.4395 190.4297]
I run indexPairs = matchFeatures(A,B,'MatchThreshold',0.8) and have expected to achieve this result:
1 1 2 2 3 3 but I took this result: 1 2 3 3
If any body know a solution, please help me.

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Dima Lisin
Dima Lisin 2014-9-3
Hi Afsaneh,
You are getting this result because matchFeatures normalizes the feature vectors to have a magnitude of 1. This is because matchFeatures is designed to work with patch descriptors, such as SURF or HOG. You seem to be passing in x-y coordinates, for which the normalization and the threshold do not make sense.
  2 个评论
Afsaneh
Afsaneh 2014-9-3
Thanks Dima, yes. I used matchFeatures to match Centroid features.
Dima Lisin
Dima Lisin 2014-9-4
In that case, matchFeatures is not really suitable.

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