Histogram matching - image processing - c/c++

Question

I have two histograms.

int Hist1[10] = {1,4,3,5,2,5,4,6,3,2};

int Hist1[10] = {1,4,3,15,12,15,4,6,3,2};

Hist1's distribution is of type multi-modal;

Hist2's distribution is of type uni-modal with single prominent peak.

My questions are

1. Is there any way that i could determine the type of distribution programmatically?
2. How to quantify whether these two histograms are similar/dissimilar?

Thanks

Answer 1

Raj,

I posted a C function in your other question ( automatically compare two series -Dissimilarity test ) that will compute divergence between two sets of similar data. It's actually intended to tell you how closely real data matches predicted data but I suspect you could use it for your purpose.

Basically, the smaller the error, the more similar the two sets are.