Transactions of the Society of Information Storage Systems (정보저장시스템학회논문집)

The Society of Information Storage Systems (정보저장시스템학회)
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Improvement of Dynamic Characteristics of OIS System using Improved Band Notch and Analysis of Images

노치 대역을 개선한 이미지 흔들림 보정 장치의 동특성 향상과 이미지 분석

  • 손동훈 (LG전자 HA사업본부 냉장고연구소) ;
  • 박노철 (연세대학교 기계공학과) ;
  • 박영필 (연세대학교 기계공학과) ;
  • 박경수 (연세대학교 기계공학과)
  • Received : 2011.08.25
  • Accepted : 2011.09.23
  • Published : 2011.09.25
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Abstract

The mobile camera module is a device to be inserted in the digital device for camera feature. The mobile camera module is being shaken by vibrations such as handshake during the exposure time. The clarity is compromised by these vibrations, thus the vibration is considered as an external disturbance. Moreover the use of mobile camera module has been being expanded for automotive vibration should be considered. These external disturbances can cause image blurring, thus optical image stabilization should be applied for image compensation. The compensator is fulfilled mechanically by movable lens group or image sensor that adjusts the optical path to the camera movement. Open loop control is useful for well-defined systems like compliant mechanism. Notch filter and lead compensator are designed and applied to improve the stability and bandwidth. The final level of image compensating is confirmed by image processing with MATLAB and CODE V to verify the better performance.

Keywords

References

  1. K. Sato., S. Ishizuka., A. Nikami, and M. Sato, "CONTROL TECHNIQUES FOR OPTICAL IMAGE STABILIZING SYSTEM", Sony Corporation, Tokyo, Japan, Manuscript received June 11, 1993.
  2. Chang, H. J., Kim, P. J., Song, D. S. and Choi, J. Y., "Optical Image Stabilizing System using Multirate Fuzzy PID Controller for Mobile Device Camera", IEEE Transactions on Consumer Electronics, Vol. 55, No. 2, MAY 2009.
  3. Chi-Wei, Chiu., Paul C. P., Chao, and Din-Yuan Wu, "Optimal Design of Magnetically Actuated Optical Image Stabilizer Mechanism for Cameras in Mobile Phones via Genetic Algorithm", IEEE Transactions on Magnetics, Vol. 43, No. 6, pp. 2582-2584, 2007. https://doi.org/10.1109/TMAG.2007.893320
  4. P. Kauhanen, J. Rouvinen, "Actuator for Miniature Optical Image Stabilizer", Actuator 2006, pp. 549-552, 2006.
  5. Baek, H. W., Hur, Y. J., Song, M. G., Park, N. C., Park, Y. P., Park, K. S., Lim, S. C. and Park, J. H., "Development of OIS actuator to compensate for trembling," Proceedings of the KSNVE Annual Spring Conference, pp.509-511, 2008.
  6. Song, M. G., Hur, Y. J., Park, N. C., Park, K. S., Park, Y. P., Lim, S. C. and Park, J. H., "Design of a Voice-Coil Actuator for Optical Image Stabilization Based on Genetic Algorithm," IEEE Transactions on Magnetics, Vol. 45, No. 10, pp.4558-4561, 2009. https://doi.org/10.1109/TMAG.2009.2021399
  7. Song, M. G., Hur, Y. J., Park, N. C., Park, K. S., Park, Y. P., Lim, S. C. and Park, J. H., "Development of Small Sized Actuator for Optical Image Stabilization," International Symposium on Optomechatronic Technologies, pp.152-157, 2009.
  8. Toshiro K, Naoki Y, Hiroyuki K, Satoshi T, Takuya I., 1990, "Electronic image stabilizer for video camera use," IEEE Trans. Consumer Electronics, Vol. 36, No. 3, pp. 520-525 https://doi.org/10.1109/30.103168
  9. Ko SJ, Lee SH, Lee KH., 1998, "Digital image stabilizing algorithms based on bit-plane matching," IEEE Trans. Consumer Electronics, Vol. 44, No. 3, pp. 617-622 https://doi.org/10.1109/30.713172
  10. Koichi S, Shigeki I, Akira N, Mitsuru S., 1993, "Control techniques for optical image stabilizing system," IEEE Trans. Consumer Electronics, Vol. 39, No. 3, pp. 461-466 https://doi.org/10.1109/30.234621
  11. Song MG, Son DH, Park NC, Park KS, Park YP., 2011, "Improvement of Dynamic Characteristics of an Optical Image Stabilizer in a Compact Camera," Trans. of the KSNVE, Vol. 21, No. 2, pp. 178-185 https://doi.org/10.5050/KSNVE.2011.21.2.178
  12. Kim C, Song MG, Park NC, Park KS, Park YP, Song DY., 2011, "Design of a hybrid optical image stabilization actuator to compensate for hand trembling," Microsyst Technol, DOI 10.1007/s00542-010-1220-8