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http://dx.doi.org/10.5302/J.ICROS.2015.14.0147

Development of a 3D Shape Reconstruction System for Defects on a Hot Steel Surface  

Jang, Yu Jin (Department of Information & Communication Engineering, Dongguk University)
Lee, Joo Seob (NEDTECH Co., Ltd.)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.21, no.5, 2015 , pp. 459-464 More about this Journal
Abstract
An on-line quality control of hot steel products is one of the important issues in the steel industry because of cost minimization. In recent years, relative depth information of surface defects is increasingly required for strict quality control. In this paper, a 3D shape reconstruction scheme for defects on a hot steel surface based on a multi-spectral photometric stereo method is proposed. After simultaneously illuminating a hot steel surface by using vertical/horizontal linearly polarized lights of green and blue light sources, the corresponding 4 images are obtained. The photometric stereo method is then applied with the aid of a GPU (Graphic Processing Unit) to reconstruct the shape of the target surface based on these images. The proposed scheme was validated through experiments.
Keywords
hot steel surface; defects; 3D shape reconstruction; multi-spectral photometric stereo; GPU;
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Times Cited By KSCI : 1  (Citation Analysis)
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