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

대한전자공학회 (The Institute of Electronics and Information Engineers)
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비트량-왜곡을 고려한 효율적인 다각형 근사화 기법

An Efficient Polygonal Approximation Method in the Rate-Distorion Sense

  • 윤병주 (하이닉스반도체 시스템IC Co. SP Div. MCU응용설계팀) ;
  • 고윤호 (하이닉스반도체 시스템IC Co. SP Div. MCU응용설계팀) ;
  • 김성대 (한국과학기술원 전자전산학과 전기 및 전자공학)
  • 발행 : 2003.01.01
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⟨ 이전 논문 다음 논문 ⟩

초록

본 논문에서는 영상 객체 (object) 의 모양 정보를 효율적으로 부호화 하는 기법을 제안한다. 다각 근사화 기법은 손실 부호화 기법으로써 객체의 모양을 근사화 하는데 가장 널리 사용되고 있다. 제안된 기법은 최대 허용 오차를 만족하면서 정점을 선택할 때 기존의 순환 정점 선택 (IRM: iterated refinement method) 이나 순차적 정점 선택 (PVS: progressive vertex selection) 보다 적은 수의 정점을 선택함으로써 비트량을 줄인다. 기존의 순차적인 정점 선택 기법을 기반으로 하여 새로운 정점 선택 조건을 제안하여 비트량-왜곡면에서 우수한 성능을 가지는 부호화기를 구현하였다. 실험 결과에서 제안된 기법이 기존의 정점 선택 기법들에 비해 우수한 성능을 나타냄을 알 수 있다.

This paper proposes an efficient method for encoding the shape information of the object in the image. The polygonal approximation method is categorized into a loss coding method and is widely used for approximating object's shape information. The proposed method selects less number of vertices than IRM (iterated refinement method) or PVS (progressive vertex selection) when the maximum distortion is given, so reduces the bit-rates. The proposed method selects the vertices of a polygon with a simple and efficient method considering the rate-distortion sense. We construct the shape information coder, which shows the outstanding performance in the rate-distortion sense, based on the conventional progressive vertex selection method and the new vertex selection condition that we propose in this paper. Simulation results show that the proposed method has better performance than other conventional vertex selection methods in the tate-distortion sense.

키워드

참고문헌

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