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 realtime 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.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.