Journal of the Institute of Electronics and Information Engineers (전자공학회논문지)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Modified median filter based on multi-step

다단계 기반 수정된 미디언 필터

  • Received : 2013.10.24
  • Published : 2014.02.25
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Abstract

In this paper, we propose a modified median filter for impulse noise reduction. The proposed method based on multi-step finds noisy pixels from the corrupted image and applies filtering on the noisy pixels. Neighbor pixels for filtering are filtered by linear filter which adjusts filtering direction according to an edge. Thus, our proposed method not only preserves edge, but also reduces noise in uniform region. Experimental results show that our proposed method has better quality than those by existing modified median filtering method.

본 논문에서는 임펄스 잡음을 제거하는 수정된 미디언 필터를 제안한다. 다단계를 기반으로 하는 제안 방법은 먼저 잡음 영상에서 잡음과 화소를 분리하고 잡음으로 판단된 화소를 미디언 필터링한다. 이때 필터링에 사용하는 주변 화소들을 에지에 따라 방향을 조절하여 필터링하는 선형필터링 한 값으로 대체한다. 따라서 제안하는 방법은 에지를 유지할 뿐 아니라 일정한 지역에서 잡음을 효과적으로 제거한다. 실험결과, 제안하는 방법이 기존 수정된 미디언 필터 보다 향상된 결과를 보인다.

Keywords

References

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