6 August 1993 Determining surface orientation by using spherical representation of a surface
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Proceedings Volume 2056, Intelligent Robots and Computer Vision XII: Active Vision and 3D Methods; (1993); doi: 10.1117/12.150201
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States
Abstract
In this paper, a new calculating method is given for determining object surface orientation based on two images by using spherical representation of a surface and the solution is gotten more easily than by using gradient space. Furthermore, the relationship of the solutions reveals that the true solution vectors and the extraneous solution vectors are symmetric with respect to the light source plane. The surface rebuilt by one set of solutions is the true object surface and the surface rebuilt by another set of solutions is a mirror image of true surface with respect to the light source plane. The methods of rebuilding surface shape from surface orientation are given respectively in an orthographic projection and a perspective projection. The methods mentioned above are proved by simulated calculation.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Dong Wu, Zhishen Liu, "Determining surface orientation by using spherical representation of a surface", Proc. SPIE 2056, Intelligent Robots and Computer Vision XII: Active Vision and 3D Methods, (6 August 1993); doi: 10.1117/12.150201; https://doi.org/10.1117/12.150201
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KEYWORDS
Light sources

Optical spheres

Spherical lenses

Computer vision technology

Machine vision

Reflectivity

Robot vision

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