Corner features for unifying coordinate systems of multiple liDAR stations

Jaan-Rong Tsay, Shu Yi Lee

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

This paper proposes a semi-automatic method for registration of terrestrial laser point sets acquired at different stations. Firstly, a point cloud on a local plane is selected manually, and then a mathematical plane is fitted in a least squares manner onto them. Three local planes on an object corner are thus respectively determined, and their intersection point is computed by solving these three plane equations. Such points are used as tie points for transforming different laser coordinate systems into a common one. The transformation is bad in cases of inaccurate, or insufficient, or worse-distributed tie points. This paper adopts suitable "virtual corner points" to solve this problem. The test results show that suitable virtual corner points really can improve the geometrical condition for the transformation and thus raise the accuracy of corresponding transform parameters with the improvement rate of 36% to 71%. On the other hand, the ratio of the RMSD-value to the scanning distance S becomes a constant of 0.00015 in case of S ≫ 50m, where RMSD denotes the root mean square value of the perpendicular distance from a laser point to its corresponding plane.

Original languageEnglish
Title of host publicationAsian Association on Remote Sensing - 26th Asian Conference on Remote Sensing and 2nd Asian Space Conference, ACRS 2005
Pages680-689
Number of pages10
Volume1
Publication statusPublished - 2005
Event26th Asian Conference on Remote Sensing, ACRS 2005 and 2nd Asian Space Conference, ASC - Ha Noi, Viet Nam
Duration: 2005 Nov 72005 Nov 11

Other

Other26th Asian Conference on Remote Sensing, ACRS 2005 and 2nd Asian Space Conference, ASC
CountryViet Nam
CityHa Noi
Period05-11-0705-11-11

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering

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