ADAPTIVE CHARACTER SEGMENTATION METHOD AND SYSTEM FOR AUTOMATED LICENSE PLATE RECOGNITION
First Claim
1. A method for adaptive character segmentation in an automatic license plate recognition application, said method comprising:
- identifying a region of interest in an image of a license plate acquired via an automatic license plate recognition engine;
segmenting of said characters in said image with respect to said region of interest using a histogram projection associated with particular segmentation threshold parameters; and
iteratively validating said characters in said image if a minimum number of valid characters is determined based on said histogram projection and said particular segmentation threshold parameters to produce character images sufficient to identify said license plate.
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Accused Products
Abstract
Methods, systems and processor-readable media for adaptive character segmentation in an automatic license plate recognition application. A region of interest can be identified in an image of a license plate acquired via an automatic license plate recognition engine. Characters in the image with respect to the region of interest can be segmented using a histogram projection associated with particular segmentation threshold parameters. The characters in the image can be iteratively validated if a minimum number of valid characters is determined based on the histogram projection and the particular segmentation threshold parameters to produce character images sufficient to identify the license plate.
57 Citations
20 Claims
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1. A method for adaptive character segmentation in an automatic license plate recognition application, said method comprising:
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identifying a region of interest in an image of a license plate acquired via an automatic license plate recognition engine; segmenting of said characters in said image with respect to said region of interest using a histogram projection associated with particular segmentation threshold parameters; and iteratively validating said characters in said image if a minimum number of valid characters is determined based on said histogram projection and said particular segmentation threshold parameters to produce character images sufficient to identify said license plate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for adaptive character segmentation in an automatic license plate recognition application, said system comprising:
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a processor; a data bus coupled to said processor; and a computer-usable medium embodying computer program code, said computer-usable medium being coupled to said data bus, said computer program code comprising instructions executable by said processor and configured for; identifying a region of interest in an image of a license plate acquired via an automatic license plate recognition engine; segmenting of said characters in said image with respect to said region of interest using a histogram projection associated with particular segmentation threshold parameters; and iteratively validating said characters in said image if a minimum number of valid characters is determined based on said histogram projection and said particular segmentation threshold parameters to produce character images sufficient to identify said license plate. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A processor-readable medium storing computer code representing instructions to cause a process for adaptive character segmentation in an automatic license plate recognition application, said computer code comprising computer code to:
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identify a region of interest in an image of a license plate acquired via an automatic license plate recognition engine; segment of said characters in said image with respect to said region of interest using a histogram projection associated with particular segmentation threshold parameters; and iteratively validate said characters in said image if a minimum number of valid characters is determined based on said histogram projection and said particular segmentation threshold parameters to produce character images sufficient to identify said license plate. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification