High speed motion estimating method for real time moving image coding and apparatus therefor 실시간 동영상 코딩과 이를 위한 장치를 위한 고속 움직임 탐색 방법

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A method for estimation of a motion image and an apparatus therefor are provided. The motion estimating method includes the steps of (a) providing layer 1 by reducing the resolution of layer 0 and providing layer 2 by reducing the resolution of layer 1, wherein the layer 0 is an input image frame, (b) calculating a mean absolute difference (MAD) with respect to a search region of the layer 2, (c) determining at least two positions in which the MAD calculated in the step (b) is minimized as initial search center points in the layer 1, (d) further determining at least one initial search center points in the layer 1 using a correlation of neighborhood blocks of a current block, (e) calculating a MAD with respect to search regions using the initial search center points as a center in the layer 1, (f) selecting a position in which the MAD calculated in the step (e) is minimized as the search center point in the layer 0, (g) calculating a MAD with respect to a search region using the initial search center points selected in the step (f) as a center in the layer 0, and (h) determining a final motion vector from information on the distance between the position in which the MAD calculated in the step (g) and the origin. It is possible to motion-estimate at a high speed by remarkably reducing the complexity with almost no reduction in the performance compared to that of a full scale block matching analysis (FSBMA).
Assignee
KAIST
Country
US (United States)
Issue Date
2002-04-23
Application Date
1999-03-01
Application Number
09259299
Registration Date
2002-04-23
Registration Number
6377623
URI
http://hdl.handle.net/10203/231893
Appears in Collection
EE-Patent(특허)
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