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Chang Hyun Park
Instrumentation & Control Team at POSCO
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Publications (3)
SPIE Journal Paper | 22 May 2017
Vision-based surface defect inspection for thick steel plates
Jong Pil Yun, Dongseob Kim, KyuHwan Kim, Sang Jun Lee, Chang Hyun Park, Sang Woo Kim
OE, Vol. 56, Issue 05, 053108, (May 2017) https://doi.org/10.1117/12.10.1117/1.OE.56.5.053108
KEYWORDS: Defect inspection, Light sources and illumination, Cameras, Image processing, Defect detection, Optical filters, Switching, Visual optics, Detection and tracking algorithms, Computer simulations
SPIE Journal Paper | 1 January 2010
Vision-based inspection for periodic defects in steel wire rod production
Changhyun Park, Seho Choi, Sangchul Won
OE, Vol. 49, Issue 01, 017202, (January 2010) https://doi.org/10.1117/12.10.1117/1.3284779
KEYWORDS: Inspection, Defect detection, Defect inspection, Detection and tracking algorithms, Algorithm development, Image processing, Discrete wavelet transforms, Signal to noise ratio, Fourier transforms, Optical engineering
Proceedings Article | 15 March 1998 Paper
Shape measurement of the cold rolled strips using the rectangular fringe shift method
HaSul Kim, Changhyun Park, Young Shin, Jin Jung
Proceedings Volume 3399, (1998) https://doi.org/10.1117/12.302537
KEYWORDS: Chromium, Phase shifts, Phase shift keying, Image processing, Gaussian filters, 3D image processing, Fringe analysis, Image filtering, Optics manufacturing, Optical filters
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