Invention Grant
- Patent Title: License plate optical character recognition method and system
- Patent Title (中): 车牌光学字符识别方法及系统
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Application No.: US13352554Application Date: 2012-01-18
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Publication No.: US08644561B2Publication Date: 2014-02-04
- Inventor: Aaron Michael Burry , Vladimir Kozitsky , Peter Paul
- Applicant: Aaron Michael Burry , Vladimir Kozitsky , Peter Paul
- Applicant Address: US CT Norwalk
- Assignee: Xerox Corporation
- Current Assignee: Xerox Corporation
- Current Assignee Address: US CT Norwalk
- Agency: Ortiz & Lopez, PLLC
- Agent Kermit D. Lopez; Luis M. Ortiz
- Main IPC: G06K9/00
- IPC: G06K9/00

Abstract:
A method and system for recognizing a license plate character utilizing a machine learning classifier. A license plate image with respect to a vehicle can be captured by an image capturing unit and the license plate image can be segmented into license plate character images. The character image can be preprocessed to remove a local background variation in the image and to define a local feature utilizing a quantization transformation. A classification margin for each character image can be identified utilizing a set of machine learning classifiers each binary in nature, for the character image. Each binary classifier can be trained utilizing a character sample as a positive class and all other characters as well as non-character images as a negative class. The character type associated with the classifier with a largest classification margin can be determined and the OCR result can be declared.
Public/Granted literature
- US20130182910A1 LICENSE PLATE OPTICAL CHARACTER RECOGNITION METHOD AND SYSTEM Public/Granted day:2013-07-18
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