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Using Fuzzy Logic to Enhance Stereo Matching in Multiresolution Images
DCA-CT-UFRN, Campus Universitário, Lagoa Nova, Universidade Federal do Rio Grande do Norte, 59072-970 Natal RN, Brazil
Instituto de Computação, LCCV & CPMAT, Universidade Federal de Alagoas, BR 104 Norte km 97, 57072-970 Maceió AL, Brazil
* Author to whom correspondence should be addressed.
Received: 10 December 2009; in revised form: 14 January 2010 / Accepted: 18 January 2010 / Published: 29 January 2010
Abstract: Stereo matching is an open problem in Computer Vision, for which local features are extracted to identify corresponding points in pairs of images. The results are heavily dependent on the initial steps. We apply image decomposition in multiresolution levels, for reducing the search space, computational time, and errors. We propose a solution to the problem of how deep (coarse) should the stereo measures start, trading between error minimization and time consumption, by starting stereo calculation at varying resolution levels, for each pixel, according to fuzzy decisions. Our heuristic enhances the overall execution time since it only employs deeper resolution levels when strictly necessary. It also reduces errors because it measures similarity between windows with enough details. We also compare our algorithm with a very fast multi-resolution approach, and one based on fuzzy logic. Our algorithm performs faster and/or better than all those approaches, becoming, thus, a good candidate for robotic vision applications. We also discuss the system architecture that efficiently implements our solution.
Keywords: image analysis; fuzzy rules; multiresolution; sensor configuration; stereo matching; vision
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MDPI and ACS Style
Medeiros, M.D.; Gonçalves, L.M.G.; Frery, A.C. Using Fuzzy Logic to Enhance Stereo Matching in Multiresolution Images. Sensors 2010, 10, 1093-1118.
Medeiros MD, Gonçalves LMG, Frery AC. Using Fuzzy Logic to Enhance Stereo Matching in Multiresolution Images. Sensors. 2010; 10(2):1093-1118.
Medeiros, Marcos D.; Gonçalves, Luiz Marcos G.; Frery, Alejandro C. 2010. "Using Fuzzy Logic to Enhance Stereo Matching in Multiresolution Images." Sensors 10, no. 2: 1093-1118.