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From: Eric Griffin on 8 May 2010 18:40
Hi,
I am trying to zero-pad and image and a lapalcian filter so that i avoid spatial-domain aliasing. I know how to find the sampling rate (as in fs=1/T)when everything is in the frequency domain of a simple math problem... but not of a read image (like a picture).

i know that this is probably an easy problem, but I'm not sure how to connect the two thoughts together.

thanks
From: Eric Griffin on 8 May 2010 18:53
Sorry, let me correct myself. I am supposed to write a function that carries out Laplacian filtering in the frequency domain, with the first step being to zero pad the input image and the laplacian filter mask to the appropriate sizes such that spatial-domain aliasing is avoided.

My issue is that I know how to do this with an easy signal that is given to me, where finding the bandwidth of the signal is obvious. I do not know who to find the bandwidth of my image nor the duration of time of my signal. I'm thinking that maybe my number of samples are the number of pixels in the image.

Any suggestions on the thought process would help...
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