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<front>
<journal-meta>
<journal-id journal-id-type="publisher">ISPRS-Archives</journal-id>
<journal-title-group>
<journal-title>The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences</journal-title>
<abbrev-journal-title abbrev-type="publisher">ISPRS-Archives</abbrev-journal-title>
<abbrev-journal-title abbrev-type="nlm-ta">Int. Arch. Photogramm. Remote Sens. Spatial Inf. Sci.</abbrev-journal-title>
</journal-title-group>
<issn pub-type="epub">2194-9034</issn>
<publisher><publisher-name>ISPRS</publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/isprsarchives-XXXIX-B5-553-2012</article-id>
<title-group>
<article-title>RECORDING APPROACH OF HERITAGE SITES BASED ON MERGING POINT CLOUDS FROM HIGH RESOLUTION PHOTOGRAMMETRY AND TERRESTRIAL LASER SCANNING</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Grussenmeyer</surname>
<given-names>P.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Alby</surname>
<given-names>E.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Landes</surname>
<given-names>T.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Koehl</surname>
<given-names>M.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Guillemin</surname>
<given-names>S.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Hullo</surname>
<given-names>J. F.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Assali</surname>
<given-names>P.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
<contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>Smigiel</surname>
<given-names>E.</given-names>
</name>
<xref ref-type="aff" rid="aff1">
<sup>1</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>The Image Sciences, Computer Sciences and Remote Sensing Laboratory LSIIT-TRIO UMR 7005, INSA Strasbourg, France</addr-line>
</aff>
<pub-date pub-type="epub">
<day>30</day>
<month>07</month>
<year>2012</year>
</pub-date>
<volume>XXXIX-B5</volume>
<fpage>553</fpage>
<lpage>558</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2012 P. Grussenmeyer et al.</copyright-statement>
<copyright-year>2012</copyright-year>
<license license-type="open-access">
<license-p>This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit <ext-link ext-link-type="uri"  xlink:href="https://creativecommons.org/licenses/by/3.0/">https://creativecommons.org/licenses/by/3.0/</ext-link></license-p>
</license>
</permissions>
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<self-uri xlink:href="https://isprs-archives.copernicus.org/articles/XXXIX-B5/553/2012/isprs-archives-XXXIX-B5-553-2012.pdf">The full text article is available as a PDF file from https://isprs-archives.copernicus.org/articles/XXXIX-B5/553/2012/isprs-archives-XXXIX-B5-553-2012.pdf</self-uri>
<abstract>
<p>Different approaches and tools are required in Cultural Heritage Documentation to deal with the complexity of monuments and sites.
The documentation process has strongly changed in the last few years, always driven by technology. &lt;i&gt;Accurate documentation is
closely relied to advances of technology (imaging sensors, high speed scanning, automation in recording and processing data) for
the purposes of conservation works, management, appraisal, assessment of the structural condition, archiving, publication and
research (Patias et al., 2008). We want to focus in this paper on the recording aspects of cultural heritage documentation, especially
the generation of geometric and photorealistic 3D models for accurate reconstruction and visualization purposes. The selected
approaches are based on the combination of photogrammetric dense matching and Terrestrial Laser Scanning (TLS) techniques.
Both techniques have pros and cons and recent advances have changed the way of the recording approach. The choice of the best
workflow relies on the site configuration, the performances of the sensors, and criteria as geometry, accuracy, resolution, georeferencing,
texture, and of course processing time. TLS techniques (time of flight or phase shift systems) are widely used for
recording large and complex objects and sites. Point cloud generation from images by dense stereo or multi-view matching can be
used as an alternative or as a complementary method to TLS. Compared to TLS, the photogrammetric solution is a low cost one, as
the acquisition system is limited to a high-performance digital camera and a few accessories only. Indeed, the stereo or multi-view
matching process offers a cheap, flexible and accurate solution to get 3D point clouds. Moreover, the captured images might also be
used for models texturing. Several software packages are available, whether web-based, open source or commercial. The main
advantage of this photogrammetric or computer vision based technology is to get at the same time a point cloud (the resolution
depends on the size of the pixel on the object), and therefore an accurate meshed object with its texture. After matching and
processing steps, we can use the resulting data in much the same way as a TLS point cloud, but in addition with radiometric
information for textures.&lt;br&gt;
The discussion in this paper reviews recording and important processing steps as geo-referencing and data merging, the essential
assessment of the results, and examples of deliverables from projects of the Photogrammetry and Geomatics Group (INSA
Strasbourg, France).</p>
</abstract>
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