Image Manipulation
FFTW with OpenCV
posted bynashruddininImage Manipulation
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.
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Phase Correlation Function in OpenCV
posted bynashruddininImage Manipulation
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.
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PonXPM
posted byPonglesinImage Manipulation
PonXPM is a useful tool for converting regular image (PNG, JPEG, GIF and BMP) formats into an XPM.
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