Intelligence control of on-line dynamic gray cloth inspecting machine system module design. II. Defects inspecting module design |
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Authors: | Chung-Feng Jeffrey Kuo Te-Li Su Chia-Der Chang Chun-Hui Lee |
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Institution: | (1) Department of Polymer Engineering, National Taiwan University of Science and Technology, Taipei, 106, Taiwan, Republic of China;(2) Department of Electrical Engineering, MingChi University of Technology, Taipei, 243, Taiwan, Republic of China;(3) Graduate Institute of Automation and Control, National Taiwan University of Science and Technology, Taipei, 106, Taiwan, Republic of China |
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Abstract: | This study aimed to establish a set of gray cloth defect inspection module using image processing technique, so as to develop
a full intelligent online dynamic gray cloth defect automatic inspection system. Gray cloth defects to be recognized in this
study included holes, stains, warp missing, spider web and weft missing. First use wavelet transform and co-occurrence matrix
to find features of gray cloth defect image, next, use back-propagation neural network (BPNN) to make gray cloth defect classification
and data output. BPNN was capable of solving nonlinear problems, thus assisted in enhancing defect recognition effect. As
every defect to be inspected in this study varied in size and shape, so advantage of BPNN could be used as aid more than else.
This study primarily utilized image processing technique to inspect gray cloth defects, not only in a faster speed than common
visual inspection, but also eliminating arbitrary factors of inspectors in body and psychology during inspection, resulting
in absolute objectivity. Finally, tension control module built in Part 1 and gray cloth defect inspection module built in
this study were integrated, and a full intelligent online dynamic gray cloth defect automatic inspection system established.
As validated by experiment result, the system established in this study could successfully recognize gray cloth defects, with
total recognition rate amounting to 92.5 %. |
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Keywords: | Dynamic cloth inspecting system Defect detection Wavelet transform Co-occurrence matrix Neural network |
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