전자공학회논문지CI (Journal of the Institute of Electronics Engineers of Korea CI)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

블록 기반 영상 압축을 위한 부호화 결함 감소

Coding Artifact Reduction for Block-based Image Compression

  • 위영철 (아주대학교 정보 및 컴퓨터공학부)
  • 투고 : 2010.12.07
  • 심사 : 2011.01.07
  • 발행 : 2011.01.25
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⟨ 이전 논문 다음 논문 ⟩

초록

본 논문에서는 블록 이산 코사인 변환 (block discrete cosine transformation, BDCT) 부호화 영상에서 발생하는 구획화 결함 (blocking artifact)과 링잉 결함 (ringing artifact)을 제거하기 위하여 양방향 필터 (bilateral filter)를 이용한 새로운 후처리 방법을 제안하였다. 양방향 필터에서 파라미터 선택은 필터링 결과에 큰 영향을 주는 중요한 문제로 본 논문에서는 양방향 필터의 파라미터를 효과적으로 선택하는 방법을 제시하였다. 실험 결과는 제안된 방법이 부호화 결함을 효과적으로 개선함을 PSNR, MSDS, SSIM의 수치로 보였다.

In this paper, we propose a new post-processing technique that removes blocking and ringing artifacts in Block discrete cosine transformation (BDCT)-coded images using bilateral filtering. The selection of filter parameters is a key issue in the application of a bilateral filter because it significantly affects the result. An efficient method of selecting the bilateral filter parameters is presented. The experimental results show that the proposed approach alleviates the artifacts efficiently in terms of PSNR, MSDS, and SSIM.

키워드

참고문헌

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