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Surface Inspection System for Cold Rolled Strips Based on Image ProcessingTechnique 被引量:2
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作者 Ke Xu1 Jinwu Xu2 Shouli Lu1(l Material Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China2 Mechanical Engineering School, University of Science and Technology Beding, Beliing 100083, China) 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 1999年第4期296-298,共3页
A new surface inspection system for cold rolled strips based on image processing is introduced. The system is equipped withtwo different illumination structures and CCD matrix cameras. The structure and image processi... A new surface inspection system for cold rolled strips based on image processing is introduced. The system is equipped withtwo different illumination structures and CCD matrix cameras. The structure and image processing of the inspection system are described. Some efficient algorithms for image processing and classification are presented. The system is tested with strip samples fromcold rolling plants. The results show that the system can detect and recognize six common defects of cold rolled strips successfully. 展开更多
关键词 surface inspection system cold rolled strip image processing
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Application of automatic surface inspection system in cold-rolled strip production 被引量:2
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作者 HE Jianfeng SU Yuan +2 位作者 XIE Xianlong CAI Heng HE Chunlai 《Baosteel Technical Research》 CAS 2015年第1期18-23,共6页
The detection and classification of real-time surface defects play an important role in automotive sheet inspection and production. In this paper, an automatic surface inspection system (ASIS) based on signal proces... The detection and classification of real-time surface defects play an important role in automotive sheet inspection and production. In this paper, an automatic surface inspection system (ASIS) based on signal processing in Baosteel NO. 4 cold-rolled plant is briefly presented. We demonstrate that the strip surface defect properties such as image, type, pitch, and position can be accurately calculated and classified by the automatic surface inspection system. In the manufacturing of the high-quality cold-rolled strips, it is necessary that the real-time surface defects can be detected and transferred by the automatic surface inspection system combined with annealing lines and recoiling lines. 展开更多
关键词 cold rolled strip surface defect surface inspection
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Online application of automatic surface quality inspection system to finishing line of cold rolled strips 被引量:4
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作者 Hao Sun, Ke Xu, and Jinwu XuNational Engineering Research Center of Advanced Rolling, University of Science and Technology Beijing, Beijing 100083, China 《Journal of University of Science and Technology Beijing》 CSCD 2003年第4期38-41,共4页
An automatic surface quality inspection system installed on a finishing lineof cold rolled strips is introduced. The system is able to detect surface defects on cold rolledstrips, such as scratches, coil breaks, rusts... An automatic surface quality inspection system installed on a finishing lineof cold rolled strips is introduced. The system is able to detect surface defects on cold rolledstrips, such as scratches, coil breaks, rusts, roll imprints, and so on. Multiple CCD area scancameras were equipped to capture images of strip surface simultaneously. Defects were detectedthrough 'Dark-field illumination' which is generated by LED illuminators. Parallel computationtechnique and fast processing algorithms were developed for real-time data processing. Theapplication to the production line shows that the system is able to detect defects effectively. 展开更多
关键词 surface inspection cold rolled strip finishing line CCD cameras IMAGEPROCESSING
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Application of composite field imaging in strip surface quality inspection
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作者 YANG Shuishan HE Yonghui 《Baosteel Technical Research》 CAS 2013年第4期21-24,共4页
In strip surface quality inspection systems based on the machine vision detection technology ,image quality is a key factor affecting the final detection performance. Composite imaging methods, such as bright and dark... In strip surface quality inspection systems based on the machine vision detection technology ,image quality is a key factor affecting the final detection performance. Composite imaging methods, such as bright and dark field imaging or reflection and transmission imaging, can reveal more information by emphasizing different image aspects. Defect detection rates and defect recognition accuracy can be improved by integrating and matching information from different image acquisition settings. Practical application shows that transmission and reflection composite imaging can improve the imaging quality of penetrative defects, while bright and dark field composite imaging can enhance imaging of defects such as color deviation and stains. 展开更多
关键词 surface inspection image acquisition imaging optical path
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CAD-DIRECTED INSPECTION PLANNING FOR FREEFORM SURFACE USING CONTACT PROBES
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作者 Chen Manyi Li Bin Duan Zhengcheng 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2005年第4期579-581,共3页
A methodology for CAD-directed measurement of freeform surface using a coordinate measuring machine equipped with a touch-trigger probe is presented, mainly including adaptive sampling of measurement points and regist... A methodology for CAD-directed measurement of freeform surface using a coordinate measuring machine equipped with a touch-trigger probe is presented, mainly including adaptive sampling of measurement points and registration of freeform surface. The proposed sampling method follows four steps: Freeform surface is fitted by bi-cubic B-spline; Curvedness measure of the surface is computed; Given a number of sampling points, an iterative algorithm is constructed for selecting a set of measurement points by employing the curvedness information; The measurement points is regularized for tradeoff between maximizing the measurement accuracy and minimizing the sampling time and cost. The aforesaid algorithm is demonstrated in term of a marine propeller blade. An offset surface registration method is presented to improve alignment accuracy of freeform objects, and Monte Carlo simulation is conducted to verify the effectiveness of the method. 展开更多
关键词 Freeform surface inspection Coordinate measurement Contact probe
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Intelligent Camera for Surface Defect Inspection
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作者 CHENG Wan-sheng ZHAO Jie WANG Ke-cheng 《Semiconductor Photonics and Technology》 CAS 2007年第1期33-38,共6页
An intelligent camera for surface defect inspection is presented which can pre-process the surface image of a rolled strip and pick defective areas out at a spead of 1 600 meters per minute. The camera is made up of a... An intelligent camera for surface defect inspection is presented which can pre-process the surface image of a rolled strip and pick defective areas out at a spead of 1 600 meters per minute. The camera is made up of a high speed line CCD, a 60 Mb/s CCD digitizer with correlated double sampling function, and a field programmable gate array(FPGA), which can quickly distinguish defective areas using a perceptron embedded in FPGA thus the data to be further processed would dramatically be reduced. Some experiments show that the camera can meet high producing speed, and reduce cost and complexity of automation surface inspection systems. 展开更多
关键词 intelligent camera surface defect inspection FPGA PERCEPTRON
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An FPGA-based real-time image processing system
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作者 ZONG Dexiang HE Yonghui 《Baosteel Technical Research》 CAS 2013年第4期8-10,共3页
This paper analyzes the current difficulties encountered in on-line inspection systems of strip surface quality, specifically relating to problems with real-time processing of huge amounts of data. To address this nee... This paper analyzes the current difficulties encountered in on-line inspection systems of strip surface quality, specifically relating to problems with real-time processing of huge amounts of data. To address this need, this paper describes an FPGA-based high-speed image processing module with both hardware and software aspects. Improving these two aspects together will help the system achieve real-time processing of massive image data, and simplifies the architecture of the strip surface quality on-line inspection system. 展开更多
关键词 real-time image processing FPGA strip surface quality on-line inspection system
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