By Topic

A flexible method for recognizing four-digit numbers on a license-plate in a video scene

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$31 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

2 Author(s)
Haneda, K. ; Grad. Sch. of Comput. & Inf. Sci., Hosei Univ., Koganei, Japan ; Hanaizumi, H.

In order to realize a simple system for monitoring car movements, a flexible method was developed for recognizing four-digit numbers on a license-plate in a video scene. The method consisted of three parts; global search for finding a license plate in a scene, corner detection for removing shape deformation, and numeral character recognition. The spatial features and the spectral (color) ones were merged and processed at a time in the global search. The Hough transformation was adopted for selecting sides of the license-plate among various edges in the following corner detection. The corner points found as cross points of the neighboring sides were used for removing the shape deformation. The four-digit numbers were recognized by using a virtual pixel algorithm with centroid compensation. The global search achieved 97 % of correct detection rate for 100 sets of scenes. The corner detection achieved 65 % (39 of 65 scenes) of correct detection rate, so far. The four-digit numbers on the license-plates, whose corners were correctly detected, were recognized perfectly.

Published in:

Industrial Technology (ICIT), 2012 IEEE International Conference on

Date of Conference:

19-21 March 2012