Image data as a sine wave?

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Philip
Philip 2012-5-14
Does anybody know if it is possible to represent image data as a sine wave?

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Image Analyst
Image Analyst 2012-5-14
More info is needed. I can represent an image by a lot of sine waves - that's what its Fourier transform is.
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Walter Roberson
Walter Roberson 2012-5-14
fft() would seem to be appropriate. Just watch out for the fact that the output of fft() will very likely be complex.
Philip
Philip 2012-5-17
Thanks, I've been looking at using the output of FFT and I think it's a good way to go. Do you know how I can use the stepinfo() function on the image data, such that it can tell me the overshoot, undershoot and settling time? The document says that the input data must be a Transfer Function, but I am not sure how to compute this from the spatial pixel values...

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