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OU Jiangxia, LIU Weicheng. Fitting of sphere point clouds by weighted total least squares based on IGGⅢ scheme[J]. LASER TECHNOLOGY, 2017, 41(5): 749-753. DOI: 10.7510/jgjs.issn.1001-3806.2017.05.026
Citation: OU Jiangxia, LIU Weicheng. Fitting of sphere point clouds by weighted total least squares based on IGGⅢ scheme[J]. LASER TECHNOLOGY, 2017, 41(5): 749-753. DOI: 10.7510/jgjs.issn.1001-3806.2017.05.026
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Fitting of sphere point clouds by weighted total least squares based on IGGⅢ scheme

  • Gedogical Survey of Guangzhou, Guangzhou 510440, China

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  • Received Date: January 31, 2016
  • Revised Date: September 12, 2016
  • Published Date: September 24, 2017
    Graphical Abstract
    • Abstract
  • In order to decrease the influence of observational gross error on the fitting precision of sphere target, aiming at data characteristics of sphere target by terrestrial 3-D laser scanning and based on weighted total least squares, weight function IGG Ⅲ scheme was adopted to adaptively modify the fitting weight matrix and a new fitting method of sphere point clouds was proposed. Simulated spherical datas and scanning spherical datas were fitted separately with the new method. The results show that, based on the consideration of both observation vector error and coefficient matrix error, more accurate sphere parameters are obtained by means of reasonable definition and optimization of fitting weight matrix. The fitting evaluation index of the new method is better than the conventional method's.
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    • References (16)
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