Photometric stereo with gradated extended sources for recovery of specular surfaces

被引:2
作者
McGunnigle, G. [1 ]
机构
[1] Ctr AG, Carinthian Tech Res AG, A-9524 Villach, Austria
关键词
SHAPE; ORIENTATION; RADIANCE; MODEL;
D O I
10.1364/JOSAA.27.001127
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
A photometric stereo technique is proposed that uses four extended sources and specular reflection to estimate surface topography. It is shown that if the intensity of incident light is weighted according to its zenith angle, then the radiance of surface facets will vary linearly with their slope. A simple system that approximates this lighting distribution is demonstrated. It is shown that surface slope in the range [-0.5, 0.5] can be recovered to within a multiplicative constant. (C) 2010 Optical Society of America
引用
收藏
页码:1127 / 1136
页数:10
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