License Plate Recognition
First Claim
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1. A method for identifying characters on license plates of a vehicle on a roadway said method comprising:
- a) acquiring a plurality of images of the vehicle said images including the license plate area,b) grouping images that are determined to be of the same vehicle, the determination based upon image features of the vehicle that do not include recognition of the characters on the vehicle'"'"'s license plate,c) analyzing a single image from the grouped image to recognize the characters of the license plate,d) assigning the recognized characters from the single image to all images of the grouped images.
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Abstract
A license plate recognition and image review system and processes are described. The system includes grouping of images that are determined to be of the same vehicle, using an image encoded database such that verification of a license plate read is done through comparison of images of the actual vehicle to images from the encoded database and testing of the accuracy of a manual review process by interspersing previously identified images with real images being reviewed in a batch process.
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Citations
12 Claims
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1. A method for identifying characters on license plates of a vehicle on a roadway said method comprising:
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a) acquiring a plurality of images of the vehicle said images including the license plate area, b) grouping images that are determined to be of the same vehicle, the determination based upon image features of the vehicle that do not include recognition of the characters on the vehicle'"'"'s license plate, c) analyzing a single image from the grouped image to recognize the characters of the license plate, d) assigning the recognized characters from the single image to all images of the grouped images. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for identifying characters on license plates of a vehicle on a roadway said method comprising:
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a) acquiring a plurality of images of the vehicle said image including the license plate area at multiple points along the roadway, the plurality of images from a single point along the roadway being a transaction, b) grouping transactions from the multiple points identified as being of the same vehicle identification based upon image features that does not include character recognition of the characters on the license plate of the vehicle, c) analyzing the images in each transaction to recognize the characters of the license plate and assigning a confidence level to the recognition of the characters for each of the transactions, d) verifying the recognition of the characters, verification including comparing the vehicle signature information from the transaction images with vehicle information in a registration database and if the vehicle signature information from the transaction matches the vehicle information in the vehicle registration database verifying the correctness of the character recognition for the grouped transactions. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification