Computes an image descriptor using keypoint descriptors

[bow,idx] = extractor.compute1(kptDescs)

Input

• kptDescs Computed descriptors to match with vocabulary. It is a numeric matrix that is returned by cv.DescriptorExtractor.compute.

Output

• bow Computed output image descriptor. A vector of the same length as the vocabulary dimension.
• idx Indices of keypoints that belong to the cluster. A cell array of integer vectors. This means that idx{i} are keypoint indices that belong to the i-th cluster (word of vocabulary).