An assessment of laser range measurement on marble surfaces
An assessment of laser range measurement on marble surfaces
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发表时间：
2001
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通讯作者：
G. Godin;M. Rioux;J. Beraldin;M. Levoy;L. Cournoyer;F. Blais
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作者：
G. Godin;M. Rioux;J. Beraldin;M. Levoy;L. Cournoyer;F. Blais
激光距离传感的一个重要应用是文物收藏品的3D扫描和建模，特别是雕塑。由于世界博物馆中的雕像有很大一部分是由大理石组成的，因此需要了解这种材料在激光范围传感下的光学特性。大理石的半透明性和非均匀结构在几何测量中产生显著的偏差和增加的噪声。对卡拉拉Statuario大理石样品的实验突出了激光光斑直径和几何测量中估计的噪声水平之间的关系。还观察到深度测量中的偏差。这些现象被认为是由于在表面处或表面附近的小晶体的表面上的散射造成的。
An important application of laser range sensing is found in the 3D scanning and modelling of heritage collections, and of sculptures in particular. Since a significant proportion of the statues in the world’s museums is composed of marble, the optical properties of this material under laser range sensing need to be understood. Marble’s translucency and heterogeneous structure produce significant bias and increased noise in the geometric measurements. Experiments on a sample of Carrara Statuario marble highlight the relationship between the laser spot diameter and the estimated noise levels in the geometric measurements. A bias in the depth measurement is also observed. These phenomena are believed to result from scattering on the surface of small crystals at or near the surface.