How can I get the DC/AC for an image?

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Hossain Md Shakhawat
Hossain Md Shakhawat il 28 Nov 2016
Commentato: Hossain Md Shakhawat il 28 Nov 2016
I want to get DC and AC component of Fourier transform of an image. And calculate their ratio.

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Walter Roberson
Walter Roberson il 28 Nov 2016
fft of a vector returns a vector. The first element of that output vector is the sum of the DC component over vector. The other elements are the AC components.
Another way of calculating the DC component is mean()

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