DELAYED VEHICLE IDENTIFICATION FOR PRIVACY ENFORCEMENT
First Claim
1. A method for recognition of an identifier, comprising:
- for each of a plurality of objects, storing a first visual signature, which has been extracted from at least a part of a first image of the object captured at a first location, and first information associated with the first captured image;
computing a measure of similarity between a second visual signature and at least some of the first visual signatures to identify a matching one of the first visual signatures, based on the computed measure of similarity, the second visual signature having been extracted from at least a part of a second image of a second object captured at a second location, based on at least a part of the second image;
retrieving the stored first information associated with the matching one of the first visual signatures and stored second information associated with the second captured image;
performing a test which is a function of the retrieved stored first information and the stored second information; and
providing for recognizing an identifier of the second object based on a captured image of the second object, when it is confirmed that the test has been met.
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Accused Products
Abstract
A method for recognition of an identifier such as a license plate includes storing first visual signatures, each extracted from a first image of a respective object, such as a vehicle, captured at a first location, and first information associated with the first captured image, such as a time stamp. A second visual signature is extracted from a second image of a second object captured at a second location and second information associated with the second captured image is acquired. A measure of similarity is computed between the second visual signature and at least some of the first visual signatures to identify a matching one. A test is performed, which is a function of the first and the second information associated with the matching signatures. Only when it is confirmed that the test has been met, identifier recognition is performed to identify the identifier of the second object.
89 Citations
21 Claims
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1. A method for recognition of an identifier, comprising:
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for each of a plurality of objects, storing a first visual signature, which has been extracted from at least a part of a first image of the object captured at a first location, and first information associated with the first captured image; computing a measure of similarity between a second visual signature and at least some of the first visual signatures to identify a matching one of the first visual signatures, based on the computed measure of similarity, the second visual signature having been extracted from at least a part of a second image of a second object captured at a second location, based on at least a part of the second image; retrieving the stored first information associated with the matching one of the first visual signatures and stored second information associated with the second captured image; performing a test which is a function of the retrieved stored first information and the stored second information; and providing for recognizing an identifier of the second object based on a captured image of the second object, when it is confirmed that the test has been met. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for recognition of an identifier, comprising:
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memory which, for each of a plurality of objects, stores; a first visual signature, which has been extracted from at least a part of a first image of the object captured at a first location, and first information associated with the first visual signature, and a second visual signature, which has been extracted from at least a part of a second image of the object captured at a second location, and second information associated with the second visual signature; a signature matching component for computing a measure of similarity between one of the second visual signatures and at least some of the first visual signatures to identify a matching one of the first visual signatures, based on the computed measure of similarity; an information processing component which performs a test which is a function of the retrieved stored first information associated with the matching one of the first visual signatures and the stored second information associated with the one of the second visual signatures; an identifier recognition component which recognizes an identifier of one of the objects based on a captured image of the second object when it is confirmed that the test is met; and a processor which implements the signature matching component, the information processing component, and the identifier recognition component.
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21. A method for recognition of a vehicle identifier, comprising:
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for each of a plurality of vehicles; capturing a first image of the vehicle at a first location at a first time; capturing a second image of the vehicle at a second location at a second time, later than the first time, acquiring first information associated with the capture of the first image, acquiring second information associated with the capture of the second image, the first and second information each comprising a respective time stamp, computing a first visual signature based on at least a part of the first image of the vehicle, computing a second visual signature based on at least a part of the second image of the vehicle, storing each of the first visual signatures linked to the respective first information, and storing each of the second visual signatures linked to the respective second information; computing a measure of similarity between one of the second visual signatures and at least some of the first visual signatures to identify a matching one of the first visual signatures, based on the computed measure of similarity; retrieving the stored first information associated with the matching one of the first visual signatures and stored second information associated with the one of the second visual signatures; performing a test which is a function of the time stamps of the retrieved stored first information and the stored second information; and when it is confirmed that the test is met, providing for recognizing an identifier of one of the vehicles based on the captured first or second image of the vehicle.
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Specification