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Enhanced Auto-focus algorithm detecting target object with multi-window and fuzzy reasoning for the mobile phone  

Lee, Sang-Yong (Department of Electronics Engineering, Korea University)
Oh, Seung-Hoon (Department of Electronics Engineering, Korea University)
Kim, Soo-Won (Department of Electronics Engineering, Korea University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SD / v.44, no.3, 2007 , pp. 12-19 More about this Journal
Abstract
This paper proposes the enhanced auto-focus algorithm detecting several objects and selecting the target object. Proposed algorithm first detects some objects distributed in the image using focus measure operator and multi-window and then selects the target object through fuzzy reasoning with three fuzzy membership functions. Implementation can be simple because it only needs image sensor instead of infrared or ultrasonic equipment. Experimental result shows that the proposed algorithm can improve the quality of image by focusing to the target object.
Keywords
Auto-focus; Focus-value; Multi-window; Fuzzy; Membership function;
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