Here, I will describe and explain the basics behind analyzing the spectrum of 2-D signals - principally images! - Ryan Scheidt
The following image, referred to as "Lena" is a famous image utilized in image processing algorithms. Here are some links: [1], [2]
Here are three different 3X3 filters. The pictures show the original image (Lena), the filter, and the filtered image (done with conv2). MATLAB m-files available upon request.
Note: click on following images and follow "Full resolution" hyperlink to see full image (e.g. 1280 pixels wide).
