×

Adaptive character segmentation method and system for automated license plate recognition

  • US 9,042,647 B2
  • Filed: 06/06/2013
  • Issued: 05/26/2015
  • Est. Priority Date: 06/06/2013
  • Status: Active Grant
First Claim
Patent Images

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.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×