Computer Vision Demonstration WebsiteElectronics and Computer Science 

Fourier TransformThe Fourier transform maps a signal into its component frequencies. It does not change the the orginal signal, only its representation. It is an extremely useful opeator used in many fields. The frequency based reprentation of the original image can be filtered, removing high or low frequency information, and then converted back into a standard image. How it worksThe equation for the Fourier transform, X, of a signal x, is given by the complex integral below:
The diagram below shows a Fourier transform of a pulse:
CodeImage processing classes: Demo framework: The pages were designed and developed for educational purposes only, to demonstrate how computer vision techniques work. They are designed for no other purpose and neither the authors nor their institutions accept any liability concerning use of these pages. LinksMark Nixon & Alberto Aguado, 2002, Feature Extraction & Image Processing, Newnes

ECS  Feature Extraction & Image Processing  © 2005 University of Southampton 