In Image Processing, we will using FFT operation many times. Ufortunately, OpenCV only came with DFT function. So we need to use a third party FFT library in order to perform FFT operation. FFTW is a good choice. It's very fast and freely available at http://www.fftw.org.
This is an example on how to perform FFT operation using FFTW in OpenCV. It simply loads an image, compute FFT & IFFT, then display the final result. The resulted image has no difference with the original, as it should.
FreeVersion: 1.0 Platform(s): linux, windows Updated: Sat Apr 19 2008
Phase Correlation is a method to check the similarity of two images with equal size. It can be used for template matching, object tracking, motion estimation, etc.
This is a function to compute phase correlation by taking a reference image and a template image. the function can be extended for object tracking applications.
FreeVersion: 1.0 Platform(s): linux, windows Updated: Sat Apr 19 2008
BIOImagingOnline seeks to address a number of critical issues surrounding radiology data such as use of multimedia, wide-area access, efficient data transmission, and capability to export results to other software applications. In its initial implementation, it is setup as a demonstration technology test. The sample images range from 10 Megabytes to several hundred Megabytes to demonstrate speed and reliability.
Online Demo Available..
Version: 1.0 Platform(s): All Updated: Wed Jul 2 2003
