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A Freeform Surface Stereo Matching Method Based on Improved Census Transform

  

  1. 1. School of Mechanical Engineering, Jiangnan University, Wuxi 214122, China；

    2. Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment & Technology, Wuxi 214122, China；
    3. School of Internet of Things Engineering, Jiangnan University, Wuxi 214122, China
  • Received:2015-02-11 Online:2015-07-23 Published:2015-07-28

Abstract:

The feature points obtained from freeform surface 3D reconstruction method which based on grid projection all distribute along the projected grid lines only, and
there is none feature point on the surface among the projected grid lines, which lead to the low accuracy reconstruction. An improved Census transform stereo matching method
based on adaptive window is presented to reconstruct the surface among the projected grid lines. The method incorporates featurebased method and regionbased method. The grid
lines projected on the experimental subject surface are utilized to guide Census transform, the Hamming distance computed by dynamic disparity is used as the matching cost, and
the higher accuracy matching points are obtained after filtering. The proposed method is applied on the binary vision 3D reconstruction to validate the improved reconstruction
accuracy of surface among the projected grid lines.

Key words: grid projection, Census transform, freeform surface, 3D reconstruction, binocular vision

CLC Number: