how to use BOW with binary feature

BOWTrainer

asked 2012-12-19 05:19:29 -0600

wusong
11 ●1

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 -0600

hieuza
1 ●1

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.