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Study of automatic optical inspection for golf logo quality

[+] Author Affiliations
Ku Chin Lin

Kun Shan University, Department of Mechanical Engineering, Yun Kung City, Tainan County, 71003 Taiwan

J. Electron. Imaging. 16(3), 033016 (September 05, 2007). doi:10.1117/1.2778418
History: Received October 04, 2006; Revised February 10, 2007; Accepted March 14, 2007; Published September 05, 2007
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Currently, inspection of the quality of a golf logo requires much time and manpower. There is a demanding need to reduce the escape rate. We present a preliminary but innovative study on development of an automatic optical inspection (AOI) system for golf logo quality. This study includes the development of algorithms for logo matching, logo degradation measure, and logo alignment. Logo contour features and spatial layout are implemented in the developed matching algorithm. The feasibility of the algorithm is assured regardless of the large variation in logo orientation. The proposed degradation measure is based on local window masking and coding. It is capable of detecting logo contours with small extrusion or intrusion defects. A positioning mechanism is specifically designated for automatic logo alignment. Good logo alignment is achieved through a proposed sequential control of ball orientation to enhance the discriminating power of the proposed degradation measure. Experiments conducted support the applicability of this study. A given example shows that the escape rate vanishes, but the false-alarm rate is 1.23%. A good balance between the escape rate and the false-alarm rate is achieved based on experiences or more experiments. For practical implementation, parallel computing is suggested to reduce the overall processing time.

© 2007 SPIE and IS&T

Citation

Ku Chin Lin
"Study of automatic optical inspection for golf logo quality", J. Electron. Imaging. 16(3), 033016 (September 05, 2007). ; http://dx.doi.org/10.1117/1.2778418


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