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how to use BOW with binary feature

asked 2012-12-19 05:19:29 -0500

wusong gravatar image

Hi, I want to use the bag-of-words model in OpenCV on the binary features such as ORB, BRISK. Could you give me some advices, as the feature of ORB are binary which is not suitable for the BOW in the opencv

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answered 2012-12-20 05:35:46 -0500

hieuza gravatar image

I suggest to extend the BOW framework. Note that the distance between two features is no more in Euclidean space, it must be Hamming distance. So the following idea should work

  • to build visual vocabulary: the visual words are randomly selected among the training binary features.

  • assign a feature to the visual word of smallest Hamming distance.

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Asked: 2012-12-19 05:19:29 -0500

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Last updated: Dec 20 '12