Specification of hierarchical-model-based fast quarter-pixel motion estimation
- Authors
- Cho, Junsang; Suh, Jung W.; Jeon, Gwanggil; Jeong, Jechang
- Issue Date
- Jun-2010
- Publisher
- SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
- Keywords
- motion estimation; subpixel; MPEG-4; minimum interpolation
- Citation
- OPTICAL ENGINEERING, v.49, no.6, pp.1 - 7
- Indexed
- SCIE
SCOPUS
- Journal Title
- OPTICAL ENGINEERING
- Volume
- 49
- Number
- 6
- Start Page
- 1
- End Page
- 7
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/174857
- DOI
- 10.1117/1.3454389
- ISSN
- 0091-3286
- 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.
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