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A Study on Removing Impulse Noise using Modified Adaptive Switching Median Filter

변형된 적응 스위칭 메디안 필터를 이용한 임펄스 잡음제거에 관한 연구

  • ;
  • 김남호 (부경대학교 제어계측공학과)
  • Received : 2011.07.27
  • Accepted : 2011.08.21
  • Published : 2011.11.30

Abstract

As society has developed rapidly toward a highly advanced digital information age, a multimedia communication service for acquisition, transmission and storage of image data as well as voice has being commercialized. However, image data is always corrupted by various noises during image processing, so researches for removing noises have been continued until now. In this paper, in order to remove impulse noise we proposed modified adaptive switching median filter that consists of two stages: noise detection and noise removal. Proposed algorithm only processes noise pixels and these noise pixels are replaced by filter output, so proposed algorithm performs well not only removes noise but also preserves edge information. Also we compare existing methods using PSNR(peak signal to noise ratio) as the standard of judgement of improvement effect and choose conventional algorithms to compare with our proposed method.

사회가 고도의 디지털 정보화 시대로 급속히 발전함에 따라 영상 및 음성 데이터 획득, 전송, 저장을 위한 멀티미디어 통신 서비스가 상용화 되어가고 있다. 그러나 여전히 데이터를 처리하는 과정에서 다양한 잡음에 의해 영상의 열화가 발생하고 있으며 이러한 잡음제거에 관한 연구는 지금까지 계속되고 있다. 따라서 본 논문에서는 임펄스 잡음을 제거하기 위해, 잡음 신호의 판단과 제거 등 두 과정으로 구성된 변형된 적응 스위칭 메디안 필터를 제안하였다. 제안한 알고리즘은 잡음 신호만을 제거하고 비잡음 신호는 그대로 보존하여, 우수한 에지 보존특성 및 잡음제거 능력을 나타내었다. 그리고 개선 효과의 판단 기준으로 PSNR(peak signal to noise ratio)을 사용하였으며, 객관적인 판단을 위해 기존의 방법들과 비교하였다.

Keywords

References

  1. R. C. Gonzalez and R. E. Woods, Eds., Digital Image Processing, Prentice Hall, 2007.
  2. K. N. Plataniotis and A. N. Venetsanopoulos, Eds., Color Image Processiang and Applications, Springer, Berlin, Germany, 2000.
  3. Jung-Hua Wang and Lian-Da Lin, "Improved median filter using min-max algorithm for image processing", Electronics Letters, vol. 33, no. 16, pp. 1479-1485, October 2005.
  4. Gao Yinyu and Nam-Ho Kim, "A Study on Image Restoration Algorithm in Random-valued Impulse Noise Environment", International Journal of KIMICS, vol. 9, No. 3, pp. 331-335, June 2011.
  5. Gao Yinyu and Nam-Ho Kim, "Restoration of Images Contaminated by Mixed Gaussian and Impulse Noise using a Complex Method", International Journal of KIMICS, vol. 9, No. 3, pp. 336-340, June 2011.
  6. Z. Wang and D. Zhang, "Progressive Switching Median Filter for the Removal of Impulse Noise from Highly Corrupted Imgaes", IEEE Transactions on Circuits and System II, vol. 46, pp.78-80, 1999. https://doi.org/10.1109/82.749102

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