Title :
A comparison of FFT and DCT based Phase Correlation function for focused and defocused images
Author :
Raj, Alex Noel Joseph ; Majeeth, S. Shaik ; Staunton, R.C.
Author_Institution :
Saveetha Eng. Coll., Chennai, India
Abstract :
The paper presents a comparison study between DCT and FFT based Phase Correlation techniques to estimate translational shifts in focused and defocused images. Though FFT based techniques are efficient for motion estimation, considering real-time implementation, DCT based techniques are simpler and computationally efficient. Experimental results with simulated focused and defocused images show comparable results to FFT´s both in pixel and sub-pixel levels.
Keywords :
correlation methods; fast Fourier transforms; motion estimation; DCT based phase correlation function; FFT based phase correlation technique; defocused image; motion estimation; subpixel level; translational shift estimation; Correlation; Discrete cosine transforms; Educational institutions; Equations; Estimation; Fourier transforms; Mathematical model; Phase Correlation; depth estimation; magnification; translation;
Conference_Titel :
Machine Vision and Image Processing (MVIP), 2012 International Conference on
Conference_Location :
Taipei
Print_ISBN :
978-1-4673-2319-2
DOI :
10.1109/MVIP.2012.6428788
