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how can compute the frequency of given gray scale image?...

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sumi on 19 Mar 2014
Commented: sumi on 20 Mar 2014
I am using biomodality detection algorithm. In that algorithm using d frequency of gray image..
i am using this coding.. but i got 64x64 matrix.. i want one output from this coding..


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Answers (1)

Margreet on 19 Mar 2014
[H, f1, f2] = freqz2(h, n1, n2) returns H, the n2-by-n1 frequency response of h, and the frequency vectors f1 (of length n1) and f2 (of length n2). h is a two-dimensional FIR filter, in the form of a computational molecule. f1 and f2 are returned as normalized frequencies in the range -1.0 to 1.0, where 1.0 corresponds to half the sampling frequency, or π radians.
So if you put n1 = 1 and n2= 1, you should get a 1-by-1 frequency response H. Hope that helps.

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