EMD-L1 only supports 1-dimensional case?

asked 2015-01-01 20:55:09 -0600

ak
1

Does EMD-L1 functions only support 1-dimensional CV::Mat? If so, current version doesn't calculate EMD-L1 between two images because a image is 2-dimensional matrix.

In modules/shape/emdL1.cpp, the second argument of initBase is fixed to 1 although I think it should be sig1.cols (the number of the second dimension).

if(!initBaseTrees(sig1.rows, 1))
    return -1;

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answered 2015-01-02 13:20:20 -0600

berak
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well, you're half right, - it supports only 1dim arrays.

and you're probably half wrong, too, - it is not meant to be used with images at all .

look at the docs, "a single column floating-point matrix. Each row is the value of the histogram in each bin." - so it's meant to compare histograms, not images.

(if you want to compare images with the L1 norm, that's a straight double dist = norm(a,b,NORM_L1); )