NDLI: Vehicle License Plate tilt correction based on the Weighted Least Square Method

Content Provider	IEEE Xplore Digital Library
Author	Yifu Wang Peng Xu
Copyright Year	2010
Description	Author affiliation: Mathematics and Computer Science College, Hunan Normal University, Changsha, China (Yifu Wang; Peng Xu)
Abstract	Tilt correction is a very crucial part of the Vehicle License Plate (VLP) automatic recognition. In this paper, according to the Weighted Least Square Method (WLSM), the VLP region is fitted to a straight line and then the line slope a1 is obtained, by which the rotation angle a α is calculated. Finally the whole image is rotated by -α and the image tilt correction is performed. The experimental results definitely show that, this paper method can quickly and accurately get the tilt angle and has great robustness and adaptability. Compared with the Least Square Method (LSM), in this paper method the tilt angle is more precise and the value of objection function is smaller; Compared with Hough Transformation (HT) and Radom Transformation (RT), this paper method is featured in faster processing time and more precise tilt angle, which is particularly well adapted to the real-time tilt correction in Intelligent Transportation System (ITS).
Starting Page	126
Ending Page	130
File Size	871336
Page Count	5
File Format	PDF
ISBN	9781424455379
e-ISBN	9781424455409
DOI	10.1109/ICCSIT.2010.5563639
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-07-09
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	image ISO standards Hough transformation least square method Vehicle license plate Indexes
Content Type	Text
Resource Type	Article

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