SHAPE MEASUREMENT

Measuring 3-D shapes of a human face using photometric stereo method with color light sources and slit patterns

[+] Author Affiliations
Hitoshi Saji, Hiromasa Nakatani

Shizuoka University, Department of Computer Science, Hamamatsu?432-8011, Japan E-mail: saji@cs.inf.shizuoka.ac.jp

Opt. Eng. 42(9), 2727-2733 (Sep 01, 2003). doi:10.1117/1.1598434
History: Received Sep. 13, 2002; Revised Feb. 18, 2003; Accepted Feb. 19, 2003; Online August 22, 2003
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We propose a new method for measuring 3-D facial shapes. This method uses two point light sources with red filters and a slit pattern projector with a blue filter. The time required for sampling data can be reduced by switching the color light rays at high speed, and hence a series of 3-D shapes of a human face at each instant can be measured. First, two facial images projected by both the red light rays and the blue light stripes are taken by the video camera, and these images are separated into two shading images and one slit image using the color information. Next, the normal vectors at points on the face are computed from the two shading images using the photometric stereo method. The 3-D coordinates of the points on the light stripes are measured from the slit image using the stereo vision algorithm. Finally, all the computed results are blended and the 3-D shape of the face is computed. Experimental results are shown to demonstrate the feasibility of the proposed method. © 2003 Society of Photo-Optical Instrumentation Engineers.

© 2003 Society of Photo-Optical Instrumentation Engineers

Citation

Hitoshi Saji and Hiromasa Nakatani
"Measuring 3-D shapes of a human face using photometric stereo method with color light sources and slit patterns", Opt. Eng. 42(9), 2727-2733 (Sep 01, 2003). ; http://dx.doi.org/10.1117/1.1598434


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