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ANNOTATION FREE LICENSE PLATE RECOGNITION METHOD AND SYSTEM

  • US 20160203380A1
  • Filed: 03/16/2015
  • Published: 07/14/2016
  • Est. Priority Date: 01/13/2015
  • Status: Active Grant
First Claim
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1. A method for recognizing a license plate character, said method comprising:

  • applying a domain adaptation in at least one offline training phase to reduce a divergence between synthetic license plate character images that are synthetically generated and license plate character images manually labeled for a target jurisdiction;

    training in said at least one offline training phase a set of OCR classifiers using said license plate character images after said domain adaptation has been applied;

    receiving in an online classification phase at least one input license plate character image from said target jurisdiction; and

    determining a most likely label for a character image and a confidence associated with said label utilizing said trained OCR classifiers, thereby minimizing manual labeling required for training an OCR engine in a license plate recognition system.

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