Question

For example i have an image matrix that looks like this one:

1 2 3
1 5 6
1 5 3

Assume that my intensity goes from 1 to 6, so I need to produce something like an array:

1 : 3
2 : 1
3 : 2
4 : 0
5 : 2
6 : 1

I tried using hist function of matlab but it produced something looks really weried to me.
Can anybosy help me on that?
Thank you very much

Answer 1

I suspect that you probably haven’t specified the correct histogram bins for hist (by default it creates 10 equally spaced bins). If you’re interested in a simple histogram count, consider using histc:

vals = 1:max(A(:));
count = histc(A(:), vals);

where A is your image matrix. vals is the first column in your desired output array, and count is the the second.