A novel hexagon-based search algorithm for fast block motion estimation
ICASSP '01 Proceedings of the Acoustics, Speech, and Signal Processing, 2001. on IEEE International Conference - Volume 03
A new diamond search algorithm for fast block-matching motion estimation
IEEE Transactions on Image Processing
A novel four-step search algorithm for fast block motion estimation
IEEE Transactions on Circuits and Systems for Video Technology
A block-based gradient descent search algorithm for block motion estimation in video coding
IEEE Transactions on Circuits and Systems for Video Technology
A novel unrestricted center-biased diamond search algorithm for block motion estimation
IEEE Transactions on Circuits and Systems for Video Technology
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The paper presents a new scheme for improving the speed of the widely used diamond search (DS) in block motion estimation. It is known that the DS algorithm makes a full inner search around the center within a large diamond region, which, in our opinion, is inefficient. By exploiting the distortion information of the evaluated points in the large diamond, a new triple-based fast inner search is proposed to speed up the localized inner search with quantitative and experimental justifications. Compared with other popular fast algorithms including the original and predictive DS, enhanced DS incorporating the proposed fast inner search can achieve a significant speedup gain while maintaining similar or smaller distortion, which is clearly demonstrated in our extensive experiments on 10 video sequences.