Improving Completeness of Geometric Models from Terrestrial Laser Scanning Data
The application of terrestrial laser scanning for the documentation of cultural heritage assets is becoming increasingly common. While the point cloud by itself is sufficient for satisfying many documentation needs, it is often desirable to use this data for applications other than documentation. Fo...
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| Format: | Article |
| Language: | English |
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Czech Technical University in Prague
2011-12-01
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| Series: | Geoinformatics FCE CTU |
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| Online Access: | https://ojs.cvut.cz/ojs/index.php/gi/article/view/2673 |
| _version_ | 1818018389970386944 |
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| author | Clemens Nothegger |
| author_facet | Clemens Nothegger |
| author_sort | Clemens Nothegger |
| collection | DOAJ |
| description | The application of terrestrial laser scanning for the documentation of cultural heritage assets is becoming increasingly common. While the point cloud by itself is sufficient for satisfying many documentation needs, it is often desirable to use this data for applications other than documentation. For these purposes a triangulated model is usually required. The generation of topologically correct triangulated models from terrestrial laser scans, however, still requires much interactive editing. This is especially true when reconstructing models from medium range panoramic scanners and many scan positions. Because of residual errors in the instrument calibration and the limited spatial resolution due to the laser footprint, the point clouds from different scan positions never match perfectly. Under these circumstances many of the software packages commonly used for generating triangulated models produce models which have topological errors such as surface intersecting triangles, holes or triangles which violate the manifold property. We present an algorithm which significantly reduces the number of topological errors in the models from such data. The algorithm is a modification of the Poisson surface reconstruction algorithm. Poisson surfaces are resilient to noise in the data and the algorithm always produces a closed manifold surface. Our modified algorithm partitions the data into tiles and can thus be easily parallelized. Furthermore, it avoids introducing topological errors in occluded areas, albeit at the cost of producing models which are no longer guaranteed to be closed. The algorithm is applied to scan data of sculptures of the UNESCO World Heritage Site Schönbrunn Palace and data of a petrified oyster reef in Stetten, Austria. The results of the method’s application are discussed and compared with those of alternative methods. |
| first_indexed | 2024-04-14T07:39:39Z |
| format | Article |
| id | doaj.art-82452456562d4ec8bf1c2689e6a3f727 |
| institution | Directory Open Access Journal |
| issn | 1802-2669 |
| language | English |
| last_indexed | 2024-04-14T07:39:39Z |
| publishDate | 2011-12-01 |
| publisher | Czech Technical University in Prague |
| record_format | Article |
| series | Geoinformatics FCE CTU |
| spelling | doaj.art-82452456562d4ec8bf1c2689e6a3f7272022-12-22T02:05:33ZengCzech Technical University in PragueGeoinformatics FCE CTU1802-26692011-12-016023324010.14311/gi.6.292449Improving Completeness of Geometric Models from Terrestrial Laser Scanning DataClemens Nothegger0Institute of Photogrammetry and Remote Sensing, Vienna University of Technology Gußhausstraße 27-29, Vienna, AustriaThe application of terrestrial laser scanning for the documentation of cultural heritage assets is becoming increasingly common. While the point cloud by itself is sufficient for satisfying many documentation needs, it is often desirable to use this data for applications other than documentation. For these purposes a triangulated model is usually required. The generation of topologically correct triangulated models from terrestrial laser scans, however, still requires much interactive editing. This is especially true when reconstructing models from medium range panoramic scanners and many scan positions. Because of residual errors in the instrument calibration and the limited spatial resolution due to the laser footprint, the point clouds from different scan positions never match perfectly. Under these circumstances many of the software packages commonly used for generating triangulated models produce models which have topological errors such as surface intersecting triangles, holes or triangles which violate the manifold property. We present an algorithm which significantly reduces the number of topological errors in the models from such data. The algorithm is a modification of the Poisson surface reconstruction algorithm. Poisson surfaces are resilient to noise in the data and the algorithm always produces a closed manifold surface. Our modified algorithm partitions the data into tiles and can thus be easily parallelized. Furthermore, it avoids introducing topological errors in occluded areas, albeit at the cost of producing models which are no longer guaranteed to be closed. The algorithm is applied to scan data of sculptures of the UNESCO World Heritage Site Schönbrunn Palace and data of a petrified oyster reef in Stetten, Austria. The results of the method’s application are discussed and compared with those of alternative methods.https://ojs.cvut.cz/ojs/index.php/gi/article/view/2673laser scanning, modeling, cultural heritage, automation, documentation, triangulation |
| spellingShingle | Clemens Nothegger Improving Completeness of Geometric Models from Terrestrial Laser Scanning Data Geoinformatics FCE CTU laser scanning, modeling, cultural heritage, automation, documentation, triangulation |
| title | Improving Completeness of Geometric Models from Terrestrial Laser Scanning Data |
| title_full | Improving Completeness of Geometric Models from Terrestrial Laser Scanning Data |
| title_fullStr | Improving Completeness of Geometric Models from Terrestrial Laser Scanning Data |
| title_full_unstemmed | Improving Completeness of Geometric Models from Terrestrial Laser Scanning Data |
| title_short | Improving Completeness of Geometric Models from Terrestrial Laser Scanning Data |
| title_sort | improving completeness of geometric models from terrestrial laser scanning data |
| topic | laser scanning, modeling, cultural heritage, automation, documentation, triangulation |
| url | https://ojs.cvut.cz/ojs/index.php/gi/article/view/2673 |
| work_keys_str_mv | AT clemensnothegger improvingcompletenessofgeometricmodelsfromterrestriallaserscanningdata |