Volume 27, Issue 6 pp. 73-81
Article

A method for determining three-dimensional surface orientation of objects with textures

Koichi Shinmoto

Koichi Shinmoto

Member

Research Laboratory, Kose Corporation, Tokyo, Japan 114

Koichi Shinmoto graduated in 1994 from the Applied Chemistry Department, Waseda University and joined Kose Ltd. He is currently in the doctoral program at Tokyo University of Agriculture and Technology. He is engaged in research on sensors for skin diagnoses and systems. He is a member of Institute of Information Processing, Japan; and Institute of Measurements and Automation, Japan.

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Tsunenori Honda

Tsunenori Honda

Member

Faculty of Engineering, Tokyo University of Agriculture and Technology, Koganei, Japan 184

Tsunenori Honda graduated in 1962 from the Precision Engineering Department, Hokkaido University, and the Post-Graduate program (Precision Engineering) at the same university in 1964. He has a Dr. of Eng. degree. He engaged in research and development of automatic vehicle-control and FA system at Mechanical Research Laboratory at KOGIIN, and, in 1979, joined Tokyo University of Agriculture and Technology, where he is currently a Professor. He is engaged in research on pattern recognition, automatic machine theory, intelligent robots, and education. He was awarded five Paper Awards from JSME Institute of Precision Engineering, Japan. He is an editor of a book NC Systems Encyclopedia (Asakura Shoten), and a joint translator of a book Robotics (Nikken Kogyo). He is a member of Institute of Information Processing, Japan; and International Computer-Aided Production Engineering (Edinburgh).

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Shun'Ichi Kaneko

Shun'Ichi Kaneko

Member

Faculty of Engineering, Tokyo University of Agriculture and Technology, Koganei, Japan 184

Shun'ichi Kaneko graduated in 1977 from the Precision Engineering Department, Hokkaido University, received his Master's degree from there (Precision Engineering) in 1979, and his Ph.D. degree later. He was appointed to Research Associate (Computer Science Department) at the same university in 1979. At present, he is an Associate Professor. He has engaged in research on image understanding, visual information processing and computing robot engineering, and was awarded the Paper Award from Institute of Precision Engineering, Japan, in 1990. He is a member of Institute of Precision Engineering; Institute of Information Processing; and IEEE.

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Abstract

To reconstruct the shape of an object from its image, the conventional photometric stereo method requires a preprocessing (e.g., region segmentation based on gray levels) unless the reflectance of its surface is uniform and known; and the method is applicable only to a part of the surface illuminated by more than three light sources.

This paper proposes a method based on the photometric stereo method, but with the newly introduced restriction conditions so that the method can be applied without preprocessing to an object with surface texture including regions illuminated by fewer than three light sources. The method has been applied successfully to two spherical objects: the mean square error in the reconstruction of an object where surface texture is 0.01723, and that without texture is 0.002063.

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