Application of image processing to laser reflective pattern for multi-layer auto-focusing system

Yu Shih Hsu, Wei Yen Hsu, Shu Duan Fan, Hsiang Yen Lin, Chien Sheng Liu, Sheng Hong Jiang

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)

摘要

It is very important for laser auto-focusing systems in the applications of precise machining. The reflective laser area which is a semi-circular pattern is usually used to estimate the degree of defocusing. As work piece surface may be different in reflective properties and not always smooth, the reflective pattern is usually not a perfect semi-circle. In this study, a novel image processing algorithm is proposed to overcome this fault. Comparing with the conventional method based on the bias of gravity center, the results indicate that the proposed method can not only reconstruct the desired semi-circle back but also calculate the defocusing distant individually. After we use microscope and obtain images and perform the binary-valued image processing, we can clearly discriminate the border and structure of semicircle images and reduce the complexity of the processing of product images. The purpose of binary-valued processing is to discriminate the objects and background of images, so as to obtain the information of objects. We observe the changes of eccentric distance among images with the increases of the focal distance of microscope to determine the accuracy of microscope. The experiment results have shown the superiority of the sharpness measurement scheme we proposed.

原文English
主出版物標題2013 7th International Conference on Sensing Technology, ICST 2013
頁面762-765
頁數4
DOIs
出版狀態Published - 2013
事件2013 7th International Conference on Sensing Technology, ICST 2013 - Wellington, New Zealand
持續時間: 2013 十二月 32013 十二月 5

出版系列

名字Proceedings of the International Conference on Sensing Technology, ICST
ISSN(列印)2156-8065
ISSN(電子)2156-8073

Other

Other2013 7th International Conference on Sensing Technology, ICST 2013
國家/地區New Zealand
城市Wellington
期間13-12-0313-12-05

All Science Journal Classification (ASJC) codes

  • 人工智慧
  • 電腦科學應用
  • 訊號處理
  • 電氣與電子工程

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