Why chi-square distance is used to compare two histograms? And will it be be useful to compare two feature vectors of histogram of oriented gradients?

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Geetika 2014-12-16

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I have googled a lot but still not able to find the basic reason that why actually ch-square distance is good to compare two histograms. Please if anyone could help?

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Why chi-square distance is used to compare two histograms? And will it be be useful to compare two feature vectors of histogram of oriented gradients?

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Why chi-square distance is used to compare two histograms? And will it be be useful to compare two feature vectors of histogram of oriented gradients?

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