The Influence of the Cartographic Transformation of TLS Data on the Quality of the Automatic Registration

Jakub Markiewicz , Dorota Zawieska

Abstract

This paper discusses the issue of the influence of cartographic Terrestrial Laser Scanning (TLS) data conversion into feature-based automatic registration. Automatic registration of data is a multi-stage process, it is based on original software tools and consists of: (1) Conversion of data to the raster form, (2) register of TLS data in pairs in all possible combinations using the SURF (Speeded Up Robust Features) and FAST (Features from Accelerated Segment Test) algorithms, (3) the quality analysis of relative orientation of processed pairs, and (4) the final bundle adjustment. The following two problems, related to the influence of the spherical image, the orthoimage and the Mercator representation of the point cloud, are discussed: The correctness of the automatic tie points detection and distribution and the influence of the TLS position on the completeness of the registration process and the quality assessment. The majority of popular software applications use manually or semi-automatically determined corresponding points. However, the authors propose an original software tool to address the first issue, which automatically detects and matches corresponding points on each TLS raster representation, utilizing different algorithms (SURF and FAST). To address the second task, the authors present a series of analyses: The time of detection of characteristic points, the percentage of incorrectly detected points and adjusted characteristic points, the number of detected control and check points, the orientation accuracy of control and check points, and the distribution of control and check points. Selection of an appropriate method for the TLS point cloud conversion to the raster form and selection of an appropriate algorithm, considerably influence the completeness of the entire process, and the accuracy of data orientation. The results of the performed experiments show that fully automatic registration of the TLS point clouds in the raster forms is possible; however, it is not possible to propose one, universal form of the point cloud, because a priori knowledge concerning the scanner positions is required. If scanner stations are located close to one another in raster images or in spherical images, Mercator projections are recommended. In the case where fragments of the surface are measured under different angles from different distances and heights of the TLS, orthoimages are suggested.
Author Jakub Markiewicz (FGC / DPTSIS)
Jakub Markiewicz,,
- Department of Photogrammetry, Teledetection and Spatial Information Systems
, Dorota Zawieska (FGC / DPTSIS)
Dorota Zawieska,,
- Department of Photogrammetry, Teledetection and Spatial Information Systems
Journal seriesApplied Sciences-Basel, ISSN 2076-3417, (N/A 70 pkt)
Issue year2019
No9(3), 509
Pages1-28
Publication size in sheets1.35
Keywords in EnglishTLS registration, the cartographic projection of the TLS, quality assessment, SURF, FAST, orthoimages, spherical, Mercator
ASJC Classification1507 Fluid Flow and Transfer Processes; 1706 Computer Science Applications; 1508 Process Chemistry and Technology; 2200 General Engineering; 3105 Instrumentation; 2500 General Materials Science
DOIDOI:10.3390/app9030509
Internal identifier3/2019
Languageen angielski
Additional file
2019_Oświadczenie_Markiewicz_Zawieska_The_Influence_3.pdf of 20-02-2019
430.64 KB
Score (nominal)70
Score sourcejournalList
ScoreMinisterial score = 70.0, 20-10-2019, ArticleFromJournal
Publication indicators WoS Citations = 0; Scopus Citations = 0; Scopus SNIP (Source Normalised Impact per Paper): 2017 = 0.801; WoS Impact Factor: 2017 = 1.689 (2) - 2017=1.855 (5)
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