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An FPGA Correlation-Edge Distance approach for disparity map

Abstract : —This paper describes an FPGA Correlation-Edge Distance approach for real time disparity map generation in stereo-vision. The proposed method calculates the disparity map for the input and disparity map for Edge Distance images of a stereopair. In both cases the approximation algorithm of disparity map SAD (Sum of Absolute Differences) is used. The final disparity map is determined from the previously generated maps, considering a homogeneity parameter defined for each point in the scene. Due to low complexity when implementing stereo-vision algorithms in FPGA devices, the proposed method was implemented in a Cyclone II EP2C35F672C6 FPGA assembled in an Altera DE2 breadboard. The developed module can process stereo-pairs of 1280×1024 pixel resolution at a rate of 75 frames/s and produces 8-bit dense disparity maps within a range of disparities up to 63 pixels. The presented architecture provides a significant improvement in regions with uniformed texture over correlation based stereo-vision algorithms in the reported literature and an accelerated processing rate.
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https://hal.archives-ouvertes.fr/hal-01627287
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Submitted on : Tuesday, October 31, 2017 - 10:47:37 PM
Last modification on : Wednesday, February 24, 2021 - 4:16:01 PM
Long-term archiving on: : Thursday, February 1, 2018 - 1:25:53 PM

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Abiel Aguilar-González, Madain Perez-Patricio, Miguel Arias-Estrada, Jorge-Luis Camas-Anzueto, Héctor-Ricardo Hernández-de León, et al.. An FPGA Correlation-Edge Distance approach for disparity map. 2015 International Conference on Electronics, Communications and Computers (CONIELECOMP), Feb 2015, Cholula, Mexico. pp.21 - 28, ⟨10.1109/CONIELECOMP.2015.7086952⟩. ⟨hal-01627287⟩

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