Horizontal tilt correction for license plate image

被引:0
作者
Li, Lirong [1 ,2 ]
Sang, Hongshi [1 ]
Chang, Yufang [2 ]
机构
[1] Huazhong Univ Sci & Technol, Inst Pattern Recognit & Artificial Intelligence, Wuhan 430074, Peoples R China
[2] Hubei Univ Technol, Sch Elect & Elect Engn, Wuhan 430068, Peoples R China
来源
MIPPR 2011: MULTISPECTRAL IMAGE ACQUISITION, PROCESSING, AND ANALYSIS | 2011年 / 8002卷
关键词
License plate; Tilt correction; Horizontal edge; Projection; bilinear interpolation;
D O I
10.1117/12.901914
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
License plate location is the basis of LPR, and it is the most important part of it. Tilt vehicle license plate has an adverse effect on its character segmentation and recognition. In this paper, tilt models of a plate are analyzed and a novel approach for number plate tilt correction is presented. Horizontal incline angle is obtained by combining horizontal or vertical edge of a plate with its rotation projection. Bilinear interpolation rotation correction is performed to the plate which is tilt to the horizontal line. Experimental results show that the method can be implemented easily and offers robustness when dealing with dirty number plates and license plates in variant lighting conditions.
引用
收藏
页数:6
相关论文
共 6 条
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