METHOD AND SYSTEM FOR DETECTION-BASED SEGMENTATION-FREE LICENSE PLATE RECOGNITION
First Claim
1. A detection-based segmentation-free method for license plate recognition, said method comprising:
- detecting a discrete set of characters in a license plate region in an image of a vehicle;
performing a geometry correction based on a location of said set of characters detected in said license plate region;
sweeping an OCR across said license plate region to infer detected and undetected characters in said license plate region in said image with respect to said set of characters and detected locations of said characters; and
incorporating detected character types with respect to said characters and said detected locations of said characters as a part of said sweeping said OCR.
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Accused Products
Abstract
A detection-based segmentation-free method and system for license plate recognition. An image of a vehicle is initially captured utilizing an image-capturing unit. A license plate region is located in the image of the vehicle. A set of characters can then be detected in the license plate region and a geometry correction performed based on a location of the set of characters detected in the license plate region. An operation for sweeping an OCR across the license plate region can be performed to infer characters with respect to the set of characters and locations of the characters utilizing a hidden Markov model and leveraging anchored digit/character locations.
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Citations
20 Claims
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1. A detection-based segmentation-free method for license plate recognition, said method comprising:
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detecting a discrete set of characters in a license plate region in an image of a vehicle; performing a geometry correction based on a location of said set of characters detected in said license plate region; sweeping an OCR across said license plate region to infer detected and undetected characters in said license plate region in said image with respect to said set of characters and detected locations of said characters; and incorporating detected character types with respect to said characters and said detected locations of said characters as a part of said sweeping said OCR. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A detection-based segmentation-free system for license plate recognition, said system comprising:
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at least one processor; and a computer-usable medium embodying computer program code, said computer-usable medium capable of communicating with said at least one processor, said computer program code comprising instructions executable by said at least one processor and configured for; detecting a discrete set of characters in a license plate region in an image of a vehicle; performing a geometry correction based on a location of said set of characters detected in said license plate region; sweeping an OCR across said license plate region to infer detected and undetected characters in said license plate region in said image with respect to said set of characters and detected locations of said characters; and incorporating detected character types with respect to said characters and said detected locations of said characters as a part of said sweeping said OCR. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A non-transitory processor-readable medium storing computer code representing instructions to cause a process for detection-based segmentation-free license plate recognition, said computer code comprising code to:
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detect a discrete set of characters in a license plate region in an image of a vehicle; perform a geometry correction based on a location of said set of characters detected in said license plate region; sweep an OCR across said license plate region to infer detected and undetected characters in said license plate region in said image with respect to said set of characters and detected locations of said characters; and incorporate detected character types with respect to said characters and said detected locations of said characters as a part of said sweeping said OCR. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification