Computer Science

Computer Science ›› 2021, Vol. 48 ›› Issue (8): 175-184.doi: 10.11896/jsjkx.200400064

• Computer Graphics & Multimedia • Previous Articles     Next Articles

Stereo Track Blocks Coding System with Rotational Invariance

ZHOU Jia-li1,2, FENG Yuan-yuan1, WU Min3, WU Chao1   

  1. 1 College of Science,Zhejiang University of Technology,Hangzhou 310023,China;
    2 Key Laboratory of Advanced Manufacturing Technology of Zhejiang Province,Hangzhou 310023,China;
    3 School of Science,Zhejiang University of Science and Technology,Hangzhou 310023,China
  • Received:2020-04-15 Revised:2020-07-26 Published:2021-08-10
  • About author:ZHOU Jia-li,born in 1981,Ph.D,asso-ciate professor.His main research in-terests include computer vision,pattern recognition and image processing,classification and coding,industrial robot.(zhoulue@zjut.edu.cn)WU Chao,born in 1982,Ph.D,lecturer.His main research interests include pattern recognition and image processing,intelligent systems and applications.
  • Supported by:
    Youth Science Fund Project(11301482),Key R&D Projects of Zhejiang Province(2020C01005,2020C01006,2021C03164) and Graduate Teaching Reform Project of Zhejiang University of Technology(2018127).

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Abstract: Because the purpose and object of coding problem are different,it is necessary to make adjustments according to diffe-rent problems.For the coding problem of track blocks,a method of representing them by two-dimensional function is proposed,and track blocks are recognized by phase correlation.Firstly,track block is expanded under the two-dimensional polar coordinate system,and it is expressed as a two-dimensional discrete function.Due to the rotational invariance of the track block,the representation of track blocks is not unique,and a parameter matrix is introduced to specify a normal representation.Secondly,the phase correlation algorithm is used to measure the similarity of two track blocks.Finally,according to basic tracks in the block and their relative position,track block is compressed and encoded out of the representation of two-dimensional discrete function.Experiments show that our method has better expression of internal spatial structure and rotational invariance,and it is more extendable than the traditional coding methods.The solution of coding and matching problem is more adaptable for track blocks building and optimizing.

Key words: Classification coding, Phase correlation algorithm, Stereo track block, Two-dimensional function

CLC Number: 

  • TP391
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