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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>Copernicus Publications</publisher-name>
<publisher-loc>Göttingen, Germany</publisher-loc>
</publisher>
</journal-meta>
<article-meta>
<article-id pub-id-type="doi">10.5194/isprsarchives-XL-5-371-2014</article-id>
<title-group>
<article-title>Modelling the appearance of heritage metallic surfaces</article-title>
</title-group>
<contrib-group><contrib contrib-type="author" xlink:type="simple"><name name-style="western"><surname>MacDonald</surname>
<given-names>L.</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>Hindmarch</surname>
<given-names>J.</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>Robson</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>Terras</surname>
<given-names>M.</given-names>
</name>
<xref ref-type="aff" rid="aff2">
<sup>2</sup>
</xref>
</contrib>
</contrib-group><aff id="aff1">
<label>1</label>
<addr-line>Dept. of Civil, Environmental &amp; Geomatic Engineering, UCL, London, UK</addr-line>
</aff>
<aff id="aff2">
<label>2</label>
<addr-line>Centre for Digital Humanities, Dept. of Information Studies, UCL, London, UK</addr-line>
</aff>
<pub-date pub-type="epub">
<day>06</day>
<month>06</month>
<year>2014</year>
</pub-date>
<volume>XL-5</volume>
<fpage>371</fpage>
<lpage>377</lpage>
<permissions>
<copyright-statement>Copyright: &#x000a9; 2014 L. MacDonald et al.</copyright-statement>
<copyright-year>2014</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/XL-5/371/2014/isprs-archives-XL-5-371-2014.pdf">The full text article is available as a PDF file from https://isprs-archives.copernicus.org/articles/XL-5/371/2014/isprs-archives-XL-5-371-2014.pdf</self-uri>
<abstract>
<p>Polished metallic surfaces exhibit a high degree of specularity, which makes them difficult to reproduce accurately. We have applied
two different techniques for modelling a heritage object known as the Islamic handbag. Photogrammetric multi-view stereo enabled a
dense point cloud to be extracted from a set of photographs with calibration targets, and a geometrically accurate 3D model produced.
A new method based on photometric stereo from a set of images taken in an illumination dome enabled surface normals to be generated
for each face of the object and its appearance to be rendered, to a high degree of visual realism, when illuminated by one or more light
sources from any angles. The specularity of the reflection from the metal surface was modelled by a modified Lorentzian function.</p>
</abstract>
<counts><page-count count="7"/></counts>
</article-meta>
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