Optimized stereo matching in binocular three-dimensional measurement system using structured light

Authors：Liu Kun; Zhou Changhe^*; Wei Shengbin; Wang Shaoqing; Fan Xin; Ma Jianyong

Source：2014, 53(26).

DOI：10.1364/AO.53.006083

• Floating point operations
• Similarity evaluation
• Similarity measure
• Stereo-matching
• Structured Light
• Subpixel interpolation
• Three-dimensional measurement systems
• Triangulation method

In this paper, we develop an optimized stereo-matching method used in an active binocular three-dimensional measurement system. A traditional dense stereo-matching algorithm is time consuming due to a long search range and the high complexity of a similarity evaluation. We project a binary fringe pattern in combination with a series of N binary band limited patterns. In order to prune the search range, we execute an initial matching before exhaustive matching and evaluate a similarity measure using logical comparison instead of a complicated floating-point operation. Finally, an accurate point cloud can be obtained by triangulation methods and subpixel interpolation. The experiment results verify the computational efficiency and matching accuracy of the method.