Methods and systems for motion estimation with nonlinear motion-field smoothing

A technique of motion vector field and motion vector, applied in the field of motion estimation

Inactive Publication Date: 2011-04-13
SHARP KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the assumption of spatial coherence does not hold at motion boundaries, which often coincide with object boundaries and can lead to overly smooth (especially at motion boundaries) motion fields

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  • Methods and systems for motion estimation with nonlinear motion-field smoothing
  • Methods and systems for motion estimation with nonlinear motion-field smoothing
  • Methods and systems for motion estimation with nonlinear motion-field smoothing

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Embodiment Construction

[0024] Embodiments of the present invention will be better understood with reference to the drawings, wherein like parts are represented by like numerals throughout. Expressly, the above figures are incorporated as part of this detailed description.

[0025] It will be readily understood that the components of the present invention, as generally described and illustrated in the drawings herein, may be arranged and designed in a variety of different configurations. Accordingly, the following more detailed description of embodiments of the method and system of the present invention is not intended to limit the scope of the invention, but is merely representative of presently preferred embodiments of the invention.

[0026] Elements of embodiments of the invention may be implemented in hardware, firmware and / or software. Although the example embodiments disclosed herein may only describe one of these forms, it should be understood that a person skilled in the art could implement...

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Abstract

Aspects of the present invention are related to low complexity systems and methods for nonlinear diffusion filtering of a motion-vector field. Local weights in the nonlinear diffusion filter may be data-adaptive, and, according to one aspect of the present invention, may be determined such that spatial coherency may not be enforced at object boundaries although the object boundaries have not been explicitly detected. Thus, the methods and systems of the present invention may smooth a motion-vector field without smoothing the motion-vector field across an object boundary. According to a second aspect of the present invention, motion vectors with a low confidence value may be suppressed, while motion vectors with a high confidence value may be propagated. According to another aspect of the present invention, motion estimation methods and systems may incorporate the methods and systems of the nonlinear diffusion filtering according to the present invention.

Description

technical field [0001] Embodiments of the invention generally relate to methods and systems for motion estimation, and in particular to methods and systems for motion estimation with motion field smoothing. Background technique [0002] In motion estimation (also called optical flow estimation and displacement estimation), correspondences between areas in different video frames (also called images) in a video sequence can be determined. In addition to camera motion, object motion in the actual scene captured in a video sequence can also cause movement of visual patterns in video frames. The goal of true motion estimation may be to estimate the two-dimensional (2D) motion of a visual pattern from one frame to another, such that the estimated 2D motion may be a projection of the actual three-dimensional (3D) scene motion. Local motion estimation refers to the estimation of the motion vector for a small image area (eg, a single pixel or a small pixel block). Exemplary small bl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04N7/26G06T7/20
CPCH04N19/0026H04N7/26377H04N19/00684H04N19/00703H04N19/00066H04N19/00369H04N7/26776H04N19/0089H04N7/26058H04N19/006H04N7/26861H04N7/26122H04N19/00381H04N7/26074H04N7/26276H04N19/00139H04N19/117H04N19/136H04N19/17H04N19/196H04N19/198H04N19/513H04N19/521H04N19/53H04N19/80
Inventor 皮特鲁斯·J·L·范比克
Owner SHARP KK
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