精密工学会誌
Online ISSN : 1882-675X
Print ISSN : 0912-0289
ISSN-L : 0912-0289
画像技術の実利用特集論文
対数振幅スペクトル解析による画質評価を用いた自動外観検査用照明の自動調整法
古屋 雅章中込 広幸布施 嘉裕中村 聖名山田 博之阿部 治渡辺 寛望小谷 信司
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2014 年 80 巻 12 号 p. 1150-1156

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In the visual inspection automated by the image processing, the importance of the machine vision lighting technology have recently drawn attention among the users of the visual inspection device. The machine vision lighting technology provides methods of the selection and the adjustment of illuminations for the visual inspection appropriately. However, it is difficult for the users to study the machine vision lighting technology because it needs the knowledge and the experience. Moreover, a defective product has several defective features appeared or disappeared with the angle and the color. This paper proposes the system to adjust parameters of the illumination for the visual inspection. A non-defective product is captured by this system with modifying four parameters : light quantity of red, green and blue LEDs, and the angle of LEDs. Further, the appropriate parameters of the illumination are decided by the spectrum analysis used for the image quality evaluation. In the step of evaluation, three type of defective/non-defective products are used to evaluation. Parameters of the illumination are decided by our system using the non-defective product. All of appearance of defective-features are confirmed by the visual observation and binarizing images in all type of products using this evaluation.

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© 2014 公益社団法人 精密工学会
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