[Insight-users] Question: Evaluating the bias of Fourier Spectrum

[Jiang]

Dear ITK users,
Maybe this question is not so appropriate to put in this maillist.
However I do believe that there are some cool guys
in this list who can answer my question.
The assumption is that if the curve is smooth, then its Fourier
Transform will
have high value in low frequency bands and low value in high frequency
bands. I want to use this method to measure 
the smoothness of one curve. And I get the Fourier Transform of one
curve by the itk class.
My question is: is there a good method that can evaluate the bias of the
Fourier spectrum and give a quantitive result 
for this issue?
I'm looking forward your suggestions and hints. Thanks a lot!
 
 
 
Jiang
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