System and method for matching image information to object model information
First Claim
1. A method for evaluating region cluster image information obtained from a scene to determine whether the region cluster represents an object to be tracked, the method comprising steps of:
- generating at least one real-world feature for each region cluster that represents a characteristic of the region cluster in a real-world space comprising steps of;
(i) determining at least one possible location of a predetermined portion of the region cluster based on a viewing angle of the scene by a video camera which views the scene;
(ii) determining a distance from the video camera to the object corresponding to the region cluster in real-world coordinates for each possible location of the predetermined portion determined for the region cluster; and
(iii) generating real-world size and location information for the region cluster based on the distance; and
comparing the real-world size and location information for the region cluster with statistical information to generate a confidence value for each region cluster that represents a likelihood that the region cluster represents an object to be tracked.
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Abstract
A tracking system and method for evaluating whether image information for a region cluster of a video frame of a scene represents an hypothesis of an object to be tracked, such as a person. At least one real-world feature of a region cluster corresponding to an object to be tracked is generated. For example, the at least feature is at least one possible location of a predetermined portion of an object represented by the region cluster is determined based on a viewing angle of the scene of the video camera. A distance from the video camera to the object corresponding to the region is determined in real-world coordinates for each possible location of the predetermined portion of the region cluster. Real-world size and location information for the region cluster is determined based on the distance. The real-world size and location information for the region cluster is compared with statistical information for the particular type of object to determine a confidence value representing a measure of confidence that the region cluster represents the particular type of object.
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Citations
12 Claims
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1. A method for evaluating region cluster image information obtained from a scene to determine whether the region cluster represents an object to be tracked, the method comprising steps of:
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generating at least one real-world feature for each region cluster that represents a characteristic of the region cluster in a real-world space comprising steps of;
(i) determining at least one possible location of a predetermined portion of the region cluster based on a viewing angle of the scene by a video camera which views the scene;
(ii) determining a distance from the video camera to the object corresponding to the region cluster in real-world coordinates for each possible location of the predetermined portion determined for the region cluster; and
(iii) generating real-world size and location information for the region cluster based on the distance; and
comparing the real-world size and location information for the region cluster with statistical information to generate a confidence value for each region cluster that represents a likelihood that the region cluster represents an object to be tracked. - View Dependent Claims (2, 3, 4, 5, 6, 10)
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7. A system for evaluating region cluster image information obtained from a scene to determine whether the region cluster represents an object to be tracked, comprising:
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(a) a video camera for viewing a scene;
(b) a frame grabber coupled to the video camera for generating video frames representing image information for the scene;
(c) a processor coupled to the frame grabber, the processor being programmed to;
generate at least one real-world feature for each region cluster that represents a characteristic of the region cluster in a real-world space by (i) determining at least one possible location of a predetermined portion of the region cluster based on a viewing angle of the scene by the video camera;
(ii) determining a distance from the video camera to the object corresponding to the region cluster in real-world coordinates for each possible location of the predetermined portion determined for the region cluster; and
(iii) generating real-world size and location information for the region cluster based on the distance; and
compare the real-world size and location information for the region cluster with statistical information to determine a confidence value for each region cluster that represents a likelihood that the region cluster represents an object to be tracked. - View Dependent Claims (8, 9, 11, 12)
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Specification