Název: A survey of cloud lighting and rendering techniques
Autoři: Kanzok, Thomas
Linsen, Lars
Rosenthal, Paul
Citace zdrojového dokumentu: Journal of WSCG. 2012, vol. 20, no. 3, p. 161-170.
Datum vydání: 2012
Nakladatel: Václav Skala - UNION Agency
Typ dokumentu: article
článek
URI: http://wscg.zcu.cz/WSCG2012/!_2012-Journal-Full-3.pdf
http://hdl.handle.net/11025/1080
ISSN: 1213–6972 (hardcopy)
1213–6980 (CD-ROM)
1213–6964 (on-line)
Klíčová slova: 3D objekty;skenování;korekce jasu;vykreslování;mračna bodů
Klíčová slova v dalším jazyce: 3D objects;scanning;luminance correction;rendering;point clouds
Abstrakt: Scanning 3D objects has become a valuable asset to many applications. For larger objects such as buildings or bridges, a scanner is positioned at several locations and the scans are merged to one representation. Nowadays, such scanners provide, beside geometry, also color information. The different lighting conditions present when taking the various scans lead to severe luminance artifacts, where scans come together. We present an approach to remove such luminance inconsistencies during rendering. Our approach is based on image-space operations for both luminance correction and point-cloud rendering. It produces smooth-looking surface renderings at interactive rates without any preprocessing steps. The quality of our results is similar to the results obtained with an object-space luminance correction. In contrast to such an object-space technique the presented image-space approach allows for instantaneous rendering of scans, e.g. for immediate on-site checks of scanning quality.
Práva: © Václav Skala - UNION Agency
Vyskytuje se v kolekcích:Number 3 (2012)

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