Method for detecting human body motion in frames of a video sequence
First Claim
1. A computerized method for detecting a moving object in a sequence of frames of a video of a scene, each frame including a plurality of pixels representing light intensity values at specific locations in the scene, comprising the steps of:
- representing the object as a branched kinematic chain composed of links connected at joints;
iteratively segmenting frames by assigning groups of pixels to individual links, while estimating motion parameters for the groups of pixels assigned to the individual links until the segmented groups of pixels and the estimated motion parameters converge; and
identifying the groups of pixels as representing the moving object modeled by the branched kinematic chain.
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Abstract
In a computerized method, a moving object is detected in a sequence of frames of a video of a scene. Each of the frames includes a plurality of pixels representing measured light intensity values at specific locations in the scene. The pixels are organized in a regularized pattern in a memory. The object is modeled as a branched kinematic chain composed of links connected at joints. The frames are iteratively segmented by assigning groups of pixels having like pixel motion to individual links, while estimating motion parameters for the groups of pixels assigned to the individual links until the segmented pixels and their motion parameters converge and can be identified with the moving object as modeled by the kinematic chain.
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Citations
24 Claims
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1. A computerized method for detecting a moving object in a sequence of frames of a video of a scene, each frame including a plurality of pixels representing light intensity values at specific locations in the scene, comprising the steps of:
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representing the object as a branched kinematic chain composed of links connected at joints; iteratively segmenting frames by assigning groups of pixels to individual links, while estimating motion parameters for the groups of pixels assigned to the individual links until the segmented groups of pixels and the estimated motion parameters converge; and identifying the groups of pixels as representing the moving object modeled by the branched kinematic chain. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A computerized method for detecting a moving object in a sequence of frames of a video of a scene, each frame including a plurality of pixels representing light intensity values at specific locations in the scene, comprising the steps of:
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modeling the object by a set of links and a set of dependent differential vector functions which constraint the motion of the links; iteratively segmenting frames by assigning groups of pixels to individual links, while estimating motion parameters for the groups of pixels assigned to the individual links until the segmented groups of pixels and the estimated motion parameters converge; and identifying the groups of pixels as representing the moving object as modeled by the set of links and vector functions. - View Dependent Claims (24)
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Specification