Journal of the Institute of Electronics Engineers of Korea SP (대한전자공학회논문지SP)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Deinterlacing Method Based on Edge Direction Refinement Using Weighted Median Filter

가중중앙값 필터를 이용한 에지 방향성 보정 기반 디인터레이싱 기법

  • Jang, Seung-Min (Department of Electronics and Computer, Chonnam University) ;
  • Kim, Young-Chul (Department of Electronics and Computer, Chonnam University) ;
  • Hong, Sung-Hoon (Department of Electronics and Computer, Chonnam University)
  • 장승민 (전남대학교 전자컴퓨터공학과) ;
  • 김영철 (전남대학교 전자컴퓨터공학과) ;
  • 홍성훈 (전남대학교 전자컴퓨터공학과)
  • Published : 2009.07.25
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Abstract

In this paper, we propose an efficient deinterlacing algorithm which is an edge dependent interpolation based on edge direction refinement. The conventional edge dependent interpolation algorithms have a visually better performance than any other Intra-field deinterlacing algorithms. However they are very sensitive to noise due to the failure of estimating edge direction. In order to exactly detect edge direction, our method detects edge direction of around interpolated pixel and refines the edge direction using weighted median filter. Simulation results have shown the efficacy of the proposed method with significant improvement over the previous methods in terms of the objective PSNR quality as well as the subjective image quality.

본 논문에서는 에지 방향성 보정을 고려한 효율적인 공간적 디인터레이싱 알고리즘을 제안한다. 기존의 에지기반 디인터레이싱 알고리즘들은 다른 공간적 디인터레이싱 알고리즘들에 비해 시각적으로 우수한 결과를 나타내지만 화소단위의 상관도를 이용하여 화소를 보간하기 때문에 잘못된 에지 방향을 찾게 될 경우 영상에 잡음이 발생한다. 제안한 알고리즘은 이러한 단점을 보완하기위해 보간할 화소 주변의 에지 방향성을 검출하고 구해진 정보에 따라 가중중앙값 필터를 적용하여 에지의 방항성을 보정함으로써 정확한 에지의 방향을 찾아낸다. 실험결과 제안된 방법은 기존의 공간적 디인터레이싱 방법들에 비하여 객관적인 PSNR 성능과 주관적 화질도 우수함을 알 수 있다.

Keywords

References

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