Surface Shape Measurement Using Extended Photometric Stereo

Abstract:

Article Preview

Photometric stereo is a widely-used non-contact optical technology for surface shape measurement in industry. However, it is subject two limitations: (1) all light directions used should be known; (2) reflection on the surface to be measured should obey the Lambertian model. In this paper, an extended photometric stereo is proposed to overcome these limitations. Firstly, initial light directions are estimated in terms of normals of those points on the silhouette; secondly, an iterative process is established to refine alternately both the normals and all light directions, with specular pixels removed; at last, the final surface shape is worked out by integrating the normals. Experimental results show the considerable feasibility of this algorithm.

Info:

Periodical:

Advanced Materials Research (Volumes 301-303)

Edited by:

Riza Esa and Yanwen Wu

Pages:

908-912

DOI:

10.4028/www.scientific.net/AMR.301-303.908

Citation:

Z. Y. Zheng and B. Yang, "Surface Shape Measurement Using Extended Photometric Stereo", Advanced Materials Research, Vols. 301-303, pp. 908-912, 2011

Online since:

July 2011

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.