Symmetric Sub-Pixel Stereo Matching

  • Authors:
  • Richard Szeliski;Daniel Scharstein

  • Affiliations:
  • -;-

  • Venue:
  • ECCV '02 Proceedings of the 7th European Conference on Computer Vision-Part II
  • Year:
  • 2002

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Abstract

Two central issues in stereo algorithm design are the matching criterion and the underlying smoothness assumptions. In this paper we propose a new stereo algorithm with novel approaches to both issues. We start with a careful analysis of the properties of the continuous disparity space image (DSI), and derive a new matching cost based on the reconstructed image signals. We then use a symmetric matching process that employs visibility constraints to assign disparities to a large fraction of pixels with minimal smoothness assumptions. While the matching operates on integer disparities, sub-pixel information is maintained throughout the process. Global smoothness assumptions are delayed until a later stage in which disparities are assigned in textureless and occluded areas. We validate our approach with experimental results on stereo images with ground truth.