Method and system for multi-modal component-based tracking of an object using robust information fusion
First Claim
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1. A method for tracking an object comprising the steps of:
- receiving a video sequence comprised of a plurality of image frames;
maintaining a sample based nonparametric representation of object appearance distribution, each sample acquired at a different time instance during object tracking or any past object appearance instance;
dividing an object into one or more components for each image frame;
for each object component, estimating its motion measurement and uncertainty with respect to the sample based representation;
computing fused motion estimates by robustly fusing all motion measurements and uncertainties for each object component to determine a most dominant motion; and
using the fused motion estimates to determine the track of the object in subsequent image frames.
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Abstract
A system and method for tracking an object is disclosed. A video sequence including a plurality of image frames are received. A sample based representation of object appearance distribution is maintained. An object is divided into one or more components. For each component, its location and uncertainty with respect to the sample based representation are estimated. Variable-Bandwidth Density Based Fusion (VBDF) is applied to each component to determine a most dominant motion. The motion estimate is used to determine the track of the object.
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Citations
29 Claims
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1. A method for tracking an object comprising the steps of:
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receiving a video sequence comprised of a plurality of image frames; maintaining a sample based nonparametric representation of object appearance distribution, each sample acquired at a different time instance during object tracking or any past object appearance instance; dividing an object into one or more components for each image frame; for each object component, estimating its motion measurement and uncertainty with respect to the sample based representation; computing fused motion estimates by robustly fusing all motion measurements and uncertainties for each object component to determine a most dominant motion; and using the fused motion estimates to determine the track of the object in subsequent image frames. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for tracking a candidate object in a medical video sequence comprising a plurality of image frames, the object being represented by a plurality of labeled control points in each image frame, each control point being acquired at a different time instance during object tracking or any past object appearance instance the method comprising the steps of:
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estimating motion measurement and uncertainty for each control point; maintaining multiple appearance models; comparing each control point to one or more models; using a VBDF estimator to determine a most likely current location of each control point in a given image frame; concatenating coordinates for all of the control points; fusing the set of control points with a model that most closely resemble the set of control points; and using the fused set of control points to determine the track of the obiect in subsequent image frames. - View Dependent Claims (15, 16)
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17. A system for tracking an object comprising:
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at least one camera for capturing a video sequence of image frames; a processor associated with the at least one camera, the processor performing the following steps; i). maintaining a sample based nonparametric representation of object appearance distribution, each sample acquired at a different time instance during object tracking or any past object appearance instance; ii). dividing an object into one or more components for each image frame; iii). for each object component, estimating its motion measurement and uncertainty with respect to the sample based representation; iv). computing fused motion estimates by robustly fusing all motion measurements and uncertainty for each object component to determine a most dominant motion; and v). using the fused motion estimate to determine the track of the object in subsequent image frames. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification