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Automatic vergence and focus control of a microstereoscopic camera

[+] Author Affiliations
Soon-Yong Park

Kyungpook National University, Department of Computer Engineering, 1370 Sankyuk-dong, Puk-gu, Daegu 702-701, Korea

Jaekyoung Moon

Kyungpook National University, School of Electrical Engineering and Computer Science, 1370 Sankyuk-dong, Puk-gu, Daegu, 702-701 Korea

Namho Lee

Korea Atomic Energy Research Institute, Radiation Detection and Sensor Laboratory, 150 Dukjing-dong, Yusong-gu, Daejeon, 305-600 Korea

J. Electron. Imaging. 18(2), 023006 (May 01, 2009). doi:10.1117/1.3126384
History: Received October 31, 2008; Revised March 14, 2009; Accepted March 23, 2009; Published May 01, 2009
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This work introduces a microstereoscopic camera that employs two microvideo sensors and a micromotion stage for automatic vergence and focus control. The parallel-axis stereo configuration using two video sensors enables the stereo camera to converge and focus simultaneously on a real object. To calibrate both vergence and focus with respect to object distance, we derive a nonlinear equation relating image disparity to object distance. Distance measurement using the equation yields very accurate results at near distances. To verify focus control, image focus of different object distances with and without automatic focusing is measured and compared. 3-D reconstruction results of real objects are also presented.

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© 2009 SPIE and IS&T

Citation

Soon-Yong Park ; Jaekyoung Moon and Namho Lee
"Automatic vergence and focus control of a microstereoscopic camera", J. Electron. Imaging. 18(2), 023006 (May 01, 2009). ; http://dx.doi.org/10.1117/1.3126384


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