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http://dx.doi.org/10.5302/J.ICROS.2007.13.11.1112

A Fuzzy Search Method for Auto Focusing of CCM Test Handlers  

Kwon, Hyuk-Joong (충북대학교 제어계측공학과)
Yoon, Hee-Sang (충북대학교 제어계측공학과)
Park, Tae-Hyoung (충북대학교 제어계측공학과)
Publication Information
Journal of Institute of Control, Robotics and Systems / v.13, no.11, 2007 , pp. 1112-1118 More about this Journal
Abstract
We propose a new-focusing method for test handlers of compact camera module (CCM), The MMD (max-min difference) method is applied to calculate the focus value quickly considering the noisy output of CCM. Also, the fuzzy search method is applied to find the maximum focus value effectively. We design a fuzzy processor to control the lens position by focus values and brightness values, which improves the focusing performance in the sense of speed and processor memory. The proposed method is implemented by computer program and installed at the CCM test handler machines. The simulation results are presented to verify the usefulness of the proposed method.
Keywords
CCM(Compact Camera Module); test handler; auto focusing; fuzzy search;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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