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

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Hossain Md Shakhawat
评论： Hossain Md Shakhawat 2016-11-28
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 2016-11-28
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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