A Sub-Pixel Correspondence Search Technique for Computer Vision Applications

Kenji TAKITA  Mohammad Abdul MUQUIT  Takafumi AOKI  Tatsuo HIGUCHI  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E87-A   No.8   pp.1913-1923
Publication Date: 2004/08/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: Special Section PAPER (Special Section on Digital Signal Processing)
Category: Image/Visual Signal Processing
phase-only correlation,  phase correlation,  image matching,  sub-pixel matching,  block matching,  

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This paper presents a technique for high-accuracy correspondence search between two images using Phase-Only Correlation (POC) and its performance evaluation in a 3D measurement application. The proposed technique employs (i) a coarse-to-fine strategy using image pyramids for correspondence search and (ii) a sub-pixel window alignment technique for finding a pair of corresponding points with sub-pixel displacement accuracy. Experimental evaluation shows that the proposed method makes possible to estimate the displacement between corresponding points with approximately 0.05-pixel accuracy when using 1111-pixel matching windows. This paper also describes an application of the proposed technique to passive 3D measurement system.