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Optical Engineering

Specification of hierarchical-model-based fast quarter-pixel motion estimation
Author(s): Junsang Cho; Jung W. Suh; Gwanggil Jeon; Jechang Jeong
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Paper Abstract

We propose a robust and fast quarter-pixel motion estimation algorithm. This algorithm is an advanced version of the previously proposed model-based quarter-pixel motion estimation (MBQME). MBQME has many advantages in computational complexity, running speed, and hardware implementations. But it has the problem that it does not find the quarter-pixel positions that locate beyond the half-pixel positions. That is one of limitations of model-based motion estimation methods, and it leads to both peak-SNR degradation and bit-rate increase. To solve this problem, we propose a hierarchical mathematical model with minimum interpolations. Through this model, we can determine a motion vector at every quarter-pixel point, which is perfectly compatible with the quarter-pixel motion estimation method within international video coding standards such as MPEG-4 and H.264/AVC. The simulation results show that the proposed method yields almost the same or even better peak-SNR performance than that of full-search quarter-pixel motion estimation, with much lower computational complexity.

Paper Details

Date Published: 1 June 2010
PDF: 7 pages
Opt. Eng. 49(6) 067003 doi: 10.1117/1.3454389
Published in: Optical Engineering Volume 49, Issue 6
Show Author Affiliations
Junsang Cho, Hanyang Univ. (Korea, Republic of)
Jung W. Suh, Univ. of Pennsylvania (United States)
Gwanggil Jeon, Univ. of Ottawa (Canada)
Jechang Jeong, Hanyang Univ. (Korea, Republic of)

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