Comparative Study of Local SAD and Dynamic Programming for Stereo Processing Using Dedicated Hardware. (10th January 2010)

• Record Type: Journal Article
• Authors: Kalomiros Kalomiros, John John; Lygouras Lygouras, John John
• Other Names: Chen Chen Liang-Gee Liang-Gee Academic Editor.
• Is Part Of: EURASIP journal on advances in signal processing. Volume 2009(2009)
• Publication Date: 2010-01-10
• Subjects: Signal processing -- Periodicals; Traitement du signal; Signal processing; Periodicals; 621.3822
• DOI: 10.1155/2009/914186
• Languages: English
• ISSNs: 1687-6172

Abstract

Abstract : The processing results of two stereo accelerators implemented in reconfigurable hardware are presented. The first system implements a local method to find correspondences, the sum of absolute differences, while the second uses a global approach based on dynamic programming. The basic design principles of the two systems are presented and the systems are tested using a multitude of reference test benches. The resulting disparity maps are compared in terms of rms error and percentage of bad matches, using both textured and textureless image areas. A stereo head is developed and used with the accelerators, testing their ability in a real-world experiment of map reconstruction in real-time. It is shown that the DP-based accelerator produces the best results in almost all cases and has advantages over traditional hardware implementations based on local SAD correlation.