Method of tracking an object captured by a camera system
First Claim
1. A method of tracking an object captured by a camera system, comprising:
- receiving image data representing first and second images acquired by the camera system;
detecting a first object captured in the first image and a second object captured in the second image;
producing a first signature of the first object and a second signature of the second object, the first signature representing a first set of features of the first object and the second signature representing a second set of features of the second object;
producing data derived from the first and second signatures; and
analyzing the data with use of a match classifier including a set of match and non-match parameters that populate a feature classification space, and the match classifier including multiple decision steps performed to determine whether the second object is an instance of the first object, each of the multiple decision steps performed by the match classifier analyzing with reference to the set of match and non-match parameters to produce decision results that include accepting the first and second objects as a match or rejecting the first and second objects as a match.
6 Assignments
0 Petitions
Accused Products
Abstract
A camera system comprises an image capturing device, object detection module, object tracking module, and match classifier. The object detection module receives image data and detects objects appearing in one or more of the images. The object tracking module temporally associates instances of a first object detected in a first group of the images. The first object has a first signature representing features of the first object. The match classifier matches object instances by analyzing data derived from the first signature of the first object and a second signature of a second object detected in a second image. The second signature represents features of the second object derived from the second image. The match classifier determine whether the second signature matches the first signature. A training process automatically configures the match classifier using a set of possible object features.
61 Citations
22 Claims
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1. A method of tracking an object captured by a camera system, comprising:
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receiving image data representing first and second images acquired by the camera system; detecting a first object captured in the first image and a second object captured in the second image; producing a first signature of the first object and a second signature of the second object, the first signature representing a first set of features of the first object and the second signature representing a second set of features of the second object; producing data derived from the first and second signatures; and analyzing the data with use of a match classifier including a set of match and non-match parameters that populate a feature classification space, and the match classifier including multiple decision steps performed to determine whether the second object is an instance of the first object, each of the multiple decision steps performed by the match classifier analyzing with reference to the set of match and non-match parameters to produce decision results that include accepting the first and second objects as a match or rejecting the first and second objects as a match. - View Dependent Claims (2, 3, 4, 5, 8, 9, 10, 11, 12, 13)
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6. A method of tracking an object captured by a camera system, comprising:
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receiving image data representing first and second images acquired by the camera system; detecting a first object captured in the first image and a second object captured in the second image; producing a first signature of the first object and a second signature of the second object, the first signature representing a first set of features of the first object and the second signature representing a second set of features of the second object; producing data derived from the first and second signatures, the data corresponding to a first subset of features selected from the first set and a second subset of features selected from the second set, the first subset of features having appearance features including a first edge orientation histogram of the first object, and the second subset of features having appearance features including a second edge orientation histogram of the second object; and analyzing the data with use of a match classifier that includes N number of multiple decision steps configured in a cascade configuration and performed to determine whether the second object is an instance of the first object, and each of the N decision steps including one or more stages for analyzing portions of the data. - View Dependent Claims (7)
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14. A method of finding an object captured by a camera system, comprising:
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receiving image data representing first and second images acquired by the camera system; detecting a first object captured in the first image and a second object captured in the second image; producing a first signature of the first object and a second signature of the second object, the first signature representing a first set of features of the first object and the second signature representing a second set of features of the second object; displaying the second image of the second object on a display; accepting user input indicative of a selection of the second signature of the second object; analyzing, with reference to a set of match and non-match parameters that populate a feature classification space of a match classifier, whether the second signature matches the first signature to determine whether the second object is an instance of the first object; producing a notification indicating a match between the first and second signatures to indicate a match between the first and second objects; and sending the notification to enable responsive action to the indication of a match. - View Dependent Claims (15, 16, 17)
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18. A method of detecting an object of interest by a camera system, comprising:
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receiving image data representing the first and second images acquired by the camera system; detecting a first object captured in the first image and a second object captured in the second image; producing a first signature of the first object and a second signature of the second object, the first signature representing a first set of features of the first object and the second signature representing a second set of features of the second object; displaying the first image of the first object on the display; accepting user input indicative of a selection of the first object; analyzing, with reference to a set of match and non-match parameters that populate a feature classification space of a match classifier, whether the second signature matches the first signature to determine whether the second object is an instance of the first object; producing a notification indicating a match between the first and second signatures to indicate a match between the first and second objects; and sending the notification to enable responsive action to the indication of a match. - View Dependent Claims (19, 20, 21, 22)
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Specification