Invention Grant
- Patent Title: Method and system for identifying a license plate
- Patent Title (中): 识别车牌的方法和系统
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Application No.: US13091371Application Date: 2011-04-21
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Publication No.: US08792682B2Publication Date: 2014-07-29
- Inventor: Zhigang Fan , Vladimir Kozitsky , Aaron M. Burry
- Applicant: Zhigang Fan , Vladimir Kozitsky , Aaron M. Burry
- Applicant Address: US CT Norwalk
- Assignee: Xerox Corporation
- Current Assignee: Xerox Corporation
- Current Assignee Address: US CT Norwalk
- Agent Kermit D. Lopez; Luis M. Ortiz; William B. Shelby
- Main IPC: G06K9/00
- IPC: G06K9/00

Abstract:
A license plate localization method and system based on a combination of a top-down texture analysis and a bottom-up connected component. An image with respect to a vehicle captured by an image capturing unit can be processed in order to locate and binarize a busy area. A black run with respect to the binarized image can be analyzed and classified and one or more objects (connected components) can be generated based on the black run classification. The objects can be further classified in accordance with their size utilizing a run-length based filter to filter out a non-text object. The leftover objects can then be spatially clustered and the uniformity and linearity of the clustered objects can be examined based on a linearity test. The clustered objects can be rejected if they fail the linearity test and the detected objects can further be matched with a plate edge characteristic in order to locate a license plate.
Public/Granted literature
- US20120269398A1 METHOD AND SYSTEM FOR IDENTIFYING A LICENSE PLATE Public/Granted day:2012-10-25
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