Fast license plate verifier
First Claim
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1. A method for identifying vehicles, comprising:
- capturing a first image of a first vehicle using a first camera at a first position and a second image of the first vehicle using a second camera at a second position different from the first position;
determining a transformation between the first image and the second image;
capturing a third image of a second vehicle using the first camera;
applying the transformation to the third image to generate a fourth image of the second vehicle; and
analyzing the fourth image using a database of identified vehicles to determine an identity of the second vehicle;
capturing a fifth image of a third vehicle using the first camera and a sixth image of the third vehicle using the second camera;
determining an alternate transformation between the fifth image and the sixth image; and
determining a mean transformation as an average of the transformation and the alternate transformation, and wherein applying the transformation comprises applying the mean transformation;
capturing a seventh image of a fourth vehicle using the first camera and an eighth image of the fourth vehicle using the second camera;
determining a further transformation between the seventh image and the eighth image; and
determining if the further transformation exceeds the mean transformation by a preset threshold;
and comprising, in response to a positive determination that the further transformation exceeds the mean transformation by the preset threshold, identifying a change in an imaging parameter of one camera chosen from the first camera and the second camera.
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Abstract
A method for identifying vehicles, including capturing a first image of a first vehicle using a first camera at a first position and a second image of the first vehicle using a second camera at a second position different from the first position. The method further includes determining a transformation between the first image and the second image. A third image of a second vehicle using the first camera is captured, and the transformation is applied to the third image to generate a fourth image of the second vehicle. The fourth image is analyzed, using a database of identified vehicles, to determine an identity of the second vehicle.
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Citations
13 Claims
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1. A method for identifying vehicles, comprising:
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capturing a first image of a first vehicle using a first camera at a first position and a second image of the first vehicle using a second camera at a second position different from the first position; determining a transformation between the first image and the second image; capturing a third image of a second vehicle using the first camera;
applying the transformation to the third image to generate a fourth image of the second vehicle; and
analyzing the fourth image using a database of identified vehicles to determine an identity of the second vehicle;capturing a fifth image of a third vehicle using the first camera and a sixth image of the third vehicle using the second camera; determining an alternate transformation between the fifth image and the sixth image; and determining a mean transformation as an average of the transformation and the alternate transformation, and wherein applying the transformation comprises applying the mean transformation; capturing a seventh image of a fourth vehicle using the first camera and an eighth image of the fourth vehicle using the second camera; determining a further transformation between the seventh image and the eighth image; and
determining if the further transformation exceeds the mean transformation by a preset threshold;and comprising, in response to a positive determination that the further transformation exceeds the mean transformation by the preset threshold, identifying a change in an imaging parameter of one camera chosen from the first camera and the second camera. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Apparatus for identifying vehicles, comprising:
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a first camera which is located at a first position and which is configured to capture a first image of a first vehicle and to capture a third image of a second vehicle; a second camera which is located at a second position different from the first position and which is configured to capture a second image of the first vehicle; and a processing unit which is configured to determine a transformation between the first image and the second image, to apply the transformation to the third image to generate a fourth image of the second vehicle, and to analyze the fourth image using a database of identified vehicles to determine an identity of the second vehicle; capturing a fifth image of a third vehicle using the first camera and a sixth image of the third vehicle using the second camera; determining an alternate transformation between the fifth image and the sixth image; and determining a mean transformation as an average of the transformation and the alternate transformation, and wherein applying the transformation comprises applying the mean transformation; capturing a seventh image of a fourth vehicle using the first camera and an eighth image of the fourth vehicle using the second camera; determining a further transformation between the seventh image and the eighth image; and determining if the further transformation exceeds the mean transformation by a preset threshold; and comprising, in response to a positive determination that the further transformation exceeds the mean transformation by the preset threshold, identifying a change in an imaging parameter of one camera chosen from the first camera and the second camera. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification