12 August 2005 An integrated system for measurement of 3-D shape and color texture of artistic and architectural cultural assets
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Proceedings Volume 5857, Optical Methods for Arts and Archaeology; 58570C (2005); doi: 10.1117/12.613062
Event: Optical Metrology, 2005, Munich, Germany
Abstract
In this paper, an integrated system based on a phase-shift laser scanning for measuring shape and a imaging spectrograph for measuring color is described. The system is designed for acquisition of large areas, such as chapels or frescoed walls. The phase-shift laser range-finder provides accurate distance measurement, up to 10 meters, pointing at most target surfaces through the measurement of the phase shift. The acquisition of a complete object is performed point by point by a 2D scanning. The imaging spectrograph measures the spectrum of the light coming from on a narrow rectangular region having width and height equal to the image of the entrance slit projected on the object plane. A complete 2D image is acquired by scanning the region in the direction perpendicular to the slit height. The merging of these multiple acquisitions yields the complete spectral and spatial description of the color of the object.
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S. Capeleto, M. De Boni, M. Fedel, F. Mario, L. Poletto, G. Tondello, N. Brusco, G. Cortelazzo, "An integrated system for measurement of 3-D shape and color texture of artistic and architectural cultural assets", Proc. SPIE 5857, Optical Methods for Arts and Archaeology, 58570C (12 August 2005); doi: 10.1117/12.613062; https://doi.org/10.1117/12.613062
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KEYWORDS
Spectrographs

Laser scanners

3D vision

Calibration

Imaging systems

3D scanning

3D modeling

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