한국산학기술학회논문지 (Journal of the Korea Academia-Industrial cooperation Society)

  • 제16권3호
  • /
  • Pages.2192-2200
  • /
  • 2015
  • /
  • 1975-4701(pISSN)
  • /
  • 2288-4688(eISSN)
한국산학기술학회 (The Korea Academia-Industrial cooperation Society)
권호 표지
DOI QR코드

DOI QR Code

히스토그램 균등화 기반의 효율적인 차량용 영상 보정 알고리즘

An Efficient Vehicle Image Compensation Algorithm based on Histogram Equalization

  • 투고 : 2014.10.30
  • 심사 : 2015.03.12
  • 발행 : 2015.03.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

본 논문에서는 히스토그램 균등화 기반의 효율적인 차량용 영상 보정 알고리즘을 제안한다. 제안된 차량용 영상보정 알고리즘은 움직임 추정 및 움직임 보상을 통해 차량용 영상의 흔들림을 제거하였다. 그리고 영상을 보정하기 위해 영상을 일정 영역으로 분할하여 각각의 서브 영상에서 픽셀 값의 히스토그램을 계산하였다. 또한, 기울기를 조절하여 영상을 개선하였다. 제안된 알고리즘은 IP에 적용하여 성능 및 시간, 영상의 차이점을 평가하고, 차량용 카메라 영상의 흔들림 제거와 영상 개선을 확인하였다. 본 논문에서 제안된 차량용 영상 보정 알고리즘은 기존 차량 영상 안정화 기술과 비교하였을 때, 차량용 영상에 대한 흔들림 제거는 메모리를 사용하지 않고 실시간 처리를 했기 때문에 효율성을 입증하였다. 그리고 블록 정합을 통한 연산으로 계산 시간 감소 효과를 얻었고, 노이즈가 가장 적고 영상의 자연스러움이 더 뛰어난 복원 결과를 얻을 수 있었다.

In this paper, we propose an efficient vehicle image compensation algorithm based on Histogram Equalization. The proposed a vehicle image compensation algorithm was elimination to the vehicle image shake using motion compensation and motion estimation. And, algorithm was calculated the histogram of pixel values from each sub-image by dividing the image as the constant size areas in order to image enhancement. Also, it had enhancement to the image by adjusting the gradient. The proposed algorithm was evaluate the difference between of performance and time, image by applied to the IP, and were confirmed the image enhancement with removing of vehicle camera image shake. In this paper, the proposed vehicle image enhancement algorithm was demonstrated effectiveness when compared to existing vehicle image stabilization, because the elimination of shake for the vehicle images used real-time processing without using a memory. And it was obtained the reduction effect of the computation time by the calculated through block matching, and obtained the better restoration result for naturalness of the image with the lowest noise.

키워드

참고문헌

  1. S.Y Tak, J.M Ban, S Lew, W.J Lee, B.R Lee and H.C Kang, "A Study on an Image Stabilization in Moving Vehicle" Journal of The Institute of Electronics Engineers, vol. 49, SP no 4, pp.95-104, Jul 2012.
  2. S.Y Kim, G.K Kang, Y.W Ryu, S.Y Oh, K.S Kim, S.C Park, and J.W Kim, "Intelligent Driver Assistance Systems based on All-Around Sensing", IEIE, Journal of IEIE (TC), Vol 43, No. 9, pp49-59, Sept. 2006.
  3. Lucas, B. & Kanade, T., "An iterative image registration technique with an application to stereo vision", Proceeding DARPA Image Understanding Workshop, pp121-130, Apr. 1981.
  4. A. Karpenko, D. Jacobs, J. Baek, and M. Levoy, "Digital Video Stabilization and Rolling Shutter Correction using Gyroscopes", Stanford Tech Report CTSR 2011-03, pp1-7, Mar. 2011.
  5. A. Amanatiadis, A. Gasteratos, S. Papadakis, and V. Kaburlasos, "Image Stabilization in Active Robot Vision", INTECH, Robot Vision, pp261-274, Mar. 2010.
  6. M. Drahansky, F. Orsag, and P. Hanacek, "Accelerometer Based Digital Video Stabilization for General Security Surveillance Systems", International Journal of Security and Its Applications, Vol. 4, No. 1, pp1-10, Jan. 2010.
  7. T. Kondo, W. Kongprawechnon, "A matching technique using gradient orientation patterns", Thammasat Int. J. Sc. Tech., Vol. 14, No. 3, pp41-55, Sept. 2009.
  8. J.H. Shin, S.B. Jang, and I.H. Jee, "Introduction of Digital Image Process", Hanhit media, Jan. 2008
  9. W. Cho, D. Kim, and K. Hong, "CMOS digital image stabilization," IEEE Transactions on Consumer Electronics, Vol. 53, No. 3, pp. 979-986, Aug. 2007. DOI: http://dx.doi.org/10.1109/TCE.2007.4341576
  10. C. W. Chiu, P. C. P. Chao, and D. Y. Wu, "Optimal design of magnetically actuated optical image stabilizer mechanism for cameras in mobile phones via genetic algorithm," IEEE Trans. on Magnetics, Vol. 6, No. 43, pp. 2582-2584, Jun. 2007. DOI: http://dx.doi.org/10.1109/TMAG.2007.893320
  11. W. Cho, K. Hong, "Affine motion based CMOS distortion analysis and CMOS digital image stabilization," IEEE Trans. Consum. Electron., Vol. 53, No. 3, pp. 833- 841, Aug. 2007. DOI: http://dx.doi.org/10.1109/TCE.2007.4341576
  12. A. Amanatiadis, I. Andreadis, "An integrated dynamic image stabilizer applied to zooming systems," in Proc. of the IEEE Instr. Meas. Technol. Conf., pp. 1-5, May. 2007.