| Paper: | ITT-P3.5 | ||
| Session: | Multimedia, Automotive, Printing and Networking Applications | ||
| Time: | Friday, May 19, 16:30 - 18:30 | ||
| Presentation: | Poster | ||
| Topic: | Industry Technology Track: Image and Video Applications | ||
| Title: | FAST AUTO-FOCUS CONTROL ALGORITHM USING THE VCM HYSTERESIS COMPENSATION IN THE MOBILE PHONE CAMERA | ||
| Authors: | Tae-Kyu Kim, Jae-Sik Sohn, Kyungpook National University, Republic of Korea; Suk-Hwan Lee, Tongmyong University of Information Technology, Republic of Korea; Ki-Ryong Kwon, Pusan University, Republic of Korea; DukiGyoo Kim, Kyungpook National University, Republic of Korea | ||
| Abstract: | A practical real-time auto-focus algorithm for a digital camera is presented in this paper, and it improves the reliability and speed of the auto-focus process, especially suitable for a 2mega-pixel high definition camera. The proposed algorithm divides auto-focusing process into several modes and finds the focus by the different control current in the each mode. Additionally, an adaptive step size searching and a hysteresis compensation of the voice coil motor increased searching speed. The experimental result shows the proposed algorithm is faster auto-focusing than conventional algorithm in the VCM camera system. | ||
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