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An Improved AE System for Mobile Digital Still Camera

모바일 디지털카메라 모듈에 대한 개선된 AE 알고리즘 구현

  • Published : 2008.05.01

Abstract

In this paper, an improved AE system for digital still camera is proposed. AE system is auto exposure system to maintain optimized brightness of output image. But there is limitation for mobile devices to get high quality image with the conventional AE algorithm, because of organizational restriction of system. The conventional research has been studied only electronic shutter and AGC on the AE algorithm. In this paper, we suggest new AE algorithm included target setting, frame delay, Gamma Correction as well as electronic shutter and AGC to get high quality image. The proposed algorithm show improved result at control speed and ability of luminance expression.

Keywords

References

  1. Mutoh, N., Orihara et al., "A 1/4-inch 380k pixel ITCCD image sensor employing gate-assisted punchthrough read-out mode," IEEE Transactions on Electron Devices, vol. 42, no. 10, pp. 1783-1788, Oct, 1995 https://doi.org/10.1109/16.464418
  2. M. Furumiya, et al., "A 30frames/s 2/3-in 1.3 M-pixel progressive scan IT-CCD image sensor" IEEE Transactions on Electron Devices, vol. 48, no. 9, pp. 1922-1928, Sep, 2001 https://doi.org/10.1109/16.944178
  3. A. Morimura et al., "A digital video camera system," IEEE Trans. Consumer Electronics, vol. 36, no. 4, pp. 866-876, Nov. 1990
  4. B.-S. Kim, J.-S. Lee, Y.-Y. Jung, S.-J. Ko, "Design and implementation of auto-focusing, auto-exposure and auto-white balance video camera system," 대한전자공학회, pp. 17-20, 2001
  5. Lucent Technologies: "Researchers' invention spans the decades," Murray Hill, http://www.bell-labs.com
  6. 특허청, 2004 이미지 센서 신기술 동향 보고서, 2004
  7. J. Teuber, Digital Image Processing, Prentice Hall, 1993
  8. Streetman, Ben G, Solid State Electronic Devices, 4th ed, Prentice Hall, Englewood Cliffs, 1995
  9. S. S. Park and H. S. Uh, "CCD image sensor with variable reset operation," Journal of Semiconductor technology and science, vol. 3, no. 2, pp. 83-88, June, 2003
  10. J. Nakamura, Image Sensors and Sigmal Processing for Digital Still Cameras, Taylor & Francis, 2005
  11. M. Furumiya, K. Hatano, I. Murakami, T. Kawasaki, C. Ogawa, and Y. Nakashiba, "A 1/3-in 1.3 M-pixel single-layer electrode CCD with a high-frame-rate skip mode," IEEE transactions on Electron Devices, vol. 48, no. 9, pp. 1915-1921, September, 2001 https://doi.org/10.1109/16.944177
  12. Scientific Imageing Technologies: "An introduction to scientific imaging charge-coupled devices," Beaverton, http://www.site-inc.com
  13. Parulski, K. and McGarvey, J. E., "Automatic camera exposure control using variable exposure index CCD sensor," U.S. Patent 5610654, 1997