The Journal of Korean Institute of Communications and Information Sciences (한국통신학회논문지)

The Korean Institute of Commucations and Information Sciences (한국통신학회)
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A Spatial Error Concealment Using Pixelwise Fine Directional Interpolation

픽셀 단위의 정밀한 방향성 보간을 이용한 공간적 에러 은닉 기법

  • 김원기 (한양대학교 전자통신컴퓨터공학과 영상통신 및 신호처리 연구실) ;
  • 구자성 (한양대학교 전자통신컴퓨터공학과 영상통신 및 신호처리 연구실) ;
  • 진순종 (한양대학교 전자통신컴퓨터공학과 영상통신 및 신호처리 연구실) ;
  • 정제창 (한양대학교 전자통신컴퓨터공학과 영상통신 및 신호처리 연구실)
  • Published : 2007.02.28
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Abstract

This paper presents a block loss recovery technique for the image block data corrupted by transmission losses through the employment of fine directional interpolation (FDI). The proposed algorithm introduces a spatial direction vector (SDV). The SDVs are extracted from the edge information of the neighboring image data. Subsequently, the SDVs are adaptively applied to interpolate lost pixels on a pixel-by-pixel basis. This approach improves the capability to more reliably recover high-detailed contents in the corrupted block. Experimental results demonstrate that the FDI method performs better as compared to previous techniques.

본 논문에서는 전송 에러로 인해 발생하는 영상의 손실을 정밀한 방향성 보간(FDI: Fine Directional Interpolation)을 이용하여 복원하는 기법을 제안한다. 제안된 알고리즘은 공간 방향 벡터(SDV: Spatial Direction Vector)를 도입한다. 공간 방향 벡터는 손실블럭 주위의 영상 데이터의 에지 정보를 추출하여 구한다. 이 후 손실된 영상 블록은 공간 방향 벡터를 이용하여 픽셀단위로 적응적으로 보간함으로써 복원된다. 이러한 방식은 평탄한 영역뿐만 아니라 에지를 포함한 복잡한 영역도 우수하게 복원할 수 있다. 실험결과 제안된 방식은 기존의 공간적 에러은닉 방법과 비교하여 성능이 우수하다는 것을 알 수 있다.

Keywords

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