Gaussian High Pass Filter (MIT'S FFTW based)
By Ajanta Trivedi, July 01, 2007
This plugin implements a C++ version of Gaussian High Pass Filter (MIT'S FFTW based) algorithm as an Image Apprentice plugin.

This plugin extends the MIT's FFTW based plugin by D. Rathore to implement a Gaussian High Pass Filter. It demonstratess how to perform convolution in Frequency Domain.

A high-pass filter is a filter that passes high frequencies well, but attenuates (or reduces) frequencies lower than the cutoff frequency [Reference: Wikipedia]. High values of the input parameter (distance from the origin/center) result in edge detection. 

About Author
Ajanta Trivedi
Department of Mathematics, IIT Roorkee, India