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In the Histogram Cost Extractor module, what does the values returned by buildcostMatrix function signify?

I am using buildcostMatrix function and passing it 2 arguments which are the descriptors of two images. I am getting a matrix of double. But it is very huge and therefore hard to comprehend. Can anyone please explain how to make sensible information out of the huge matrix which is returned by the function?

In the Histogram Cost Extractor module, what does the values returned by buildcostMatrix function signify?

I am using buildcostMatrix function and passing it 2 arguments which are the descriptors of two images. I am getting a matrix of double. But it is very huge and therefore hard to comprehend. Can anyone please explain how to make sensible information out of the huge matrix which is returned by the function?

void buildCostMatrix (InputArray descriptors1, InputArray descriptors2, OutputArray costMatrix)