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《Optical Technique》 2005-03
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Research on removing the noise on the laser stripe based on the iterative fitting of B-spline

XIE Ze-xiao~1, ZHANG Cheng-guo~1, ZHANG Guo-xiong~2(1. Engineering College, Ocean University of China, Qingdao266071, China)ianjin University, Tianjin300072)  
In structured_light vision system, the accuracy of laser stripe center position is the main factor that determines the final system accuracy. The noise on the laser stripe is not removed in current extraction algorithms. Based on the analysis of these methods a novel extraction algorithm implemented by iterative fitting of B_spline was proposed. The pixels on the laser stripe were taken as control vertices for B_spline fitting. The noise was iteratively replaced by the pixel on the B_spline at the same horizontal position. A gravity model approach was applied to extract the laser stripe center after the noise removed. The number and the distribution of the pixels used in this algorithm were analyzed with the emphasis. The extraction accuracy of this algorithm was proved higher than others via contrast experiments. This demonstrates that the noise is removed effectively.
【CateGory Index】: TH744
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