Adaptive character segmentation method and system for automated license plate recognition

摘要

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.

主权项

1. A method for adaptive character segmentation in an automatic license plate recognition application, said method comprising:
identifying via at least one processor a region of interest in an image of a license plate acquired via an automatic license plate recognition engine that communicates with said at least one processor; segmenting via said at least one processor said characters in said image with respect to said region of interest using a histogram projection associated with particular segmentation threshold parameters; iteratively validating said characters in said image via said at least one processor 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; and increasing said particular segmentation threshold parameters in small steps to avoid over-segmentation.