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

The Institute of Electronics and Information Engineers (대한전자공학회)
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A Two-Stage Fast Block Matching Algorithm Using Mean Absolute Error of Neighbor Search Point

이웃 탐색점에서의 평균 절대치 오차를 이용한 2단계 고속 블록 정합 알고리듬

  • Cheong, Won-Sik (School of Electronic and Electrical Engineering, Kyungpook National University) ;
  • Lee, Bub-Ki (School of Electronic and Electrical Engineering, Kyungpook National University) ;
  • Kwon, Seong-Geun (School of Electronic and Electrical Engineering, Kyungpook National University) ;
  • Han, Chan-Ho (Dept. of Software, School of Multimedia and Information, Kyungwoon University) ;
  • Shin, Yong-Dal (School of Electronic Engineering, Youngdong University) ;
  • Sohng, Kyu-Ik (School of Electronic and Electrical Engineering, Kyungpook National University) ;
  • Lee, Kuhn-Il (School of Electronic and Electrical Engineering, Kyungpook National University)
  • 정원식 (경북대학교 전자전기공학부) ;
  • 이법기 (경북대학교 전자전기공학부) ;
  • 권성근 (경북대학교 전자전기공학부) ;
  • 한찬호 (경운대학교 멀티미디어정보학부) ;
  • 신용달 (영동대학교 전자공학부) ;
  • 송규익 (경북대학교 전자전기공학부) ;
  • 이건일 (경북대학교 전자전기공학부)
  • Published : 2000.05.25
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Abstract

In this paper, we propose a two-stage fast block matching algorithm using the mean absolute error (MAE) of neighbor search point that can reduce the computational complexity to estimate motion vector while the motion estimation error performance is nearly the same as full search algorithm (FSA) In the proposed method, the lower bound of MAE 6at current search point IS calculated using the MAE of neighbor search point And we reduce the computational complexity by performing the block matching process only at the search point that has to be block matched using the lower bound of MAE The proposed algorithm is composed of two stages The experimental results show that the proposed method drastically reduces the computational complexity while the motion compensated error performance is nearly kept same as that of FSA.

본 논문에서는 이웃 탐색점에서의 평균 절대치 오차(mean absolute error, MAE)를 이용하여 전역 탐색 알고리듬(full search algorithm, FSA)과 거의 같은 움직임 추정 성능을 얻으면서도 고속으로 움직임을 추정할 수 있는 2단계 고속 블록 정함 알고리듬을 제안하였다. 제안한 방법에서는 현재 탐색점에서 블록 정합을 통하여 얻을 수 있는 MAE의 최소 범위를 이웃 탐색점에서의 MAE를 이용하여 구한 뒤, 이를 이용하여 블록 정합이 필요한 탐색점에 대하여서만 블록 정합을 행하였다. 즉, 제안한 방법에서는 블록 정함이 필요한 탐색점 수를 줄임으로써 고속으로 움직임을 추정하였으며, 움직임 추정을 두 단계로 나누어 수행하였다 모의 설험을 통하여 제안한 방법이 FSA와 거의 같은 움직임 추정 성능을 유지하면서도 많은 계산량의 감소를 얻을 수 있음을 확인하였다

Keywords

References

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