%0 Journal Article
%T Novel License Plate Image Preprocessing Approach for Character Segmentation<br>一种新的面向字符分割的车牌图像预处理方法
%A LI Wen-ju
%A LIANG De-qun
%A CUI Lian-yan
%A BI Sheng
%A <br>李文举
%A 梁德群
%A 崔连延
%A 毕胜
%J 计算机应用研究
%D 2004
%I 
%X Firstly,some image enhancement technologies are applied to remove noise,reduce the effects of non-uniform illumination and enhance contrast;then tilt models of a plate are analyzed and a novel algorithm for number plate tilt correction is advanced.Horizontal and vertical incline angle is obtained by combining horizontal and vertical edge of a plate with its rotation projection,respectively,and a refined top and bottom localization of the plate is obtained by its vertical edge.Bilinear interpolation rotation correction is performed to the plate that is tilt to a horizontal line and bilinear interpolation correction on location excursion of pixels in a low is executed to the plate that is tilt to a vertical line.Experimental results show proposed method can be implemented easily and offers robustness when dealing with the number plate that has dirty,noise,poor contrast,non-uniform illumination or gradient.
%K License Plate Character Segmentation
%K Image Preprocessing
%K Image Enhancement
%K Tilt Correction<br>车牌字符分割
%K 图像预处理
%K 图像增强
%K 倾斜校正
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=A9D9BE08CDC44144BE8B5685705D3AED&aid=E293DB685CD64D1E&yid=D0E58B75BFD8E51C&vid=659D3B06EBF534A7&iid=DF92D298D3FF1E6E&sid=B799C1769FCACDC8&eid=89AC6B0ADBEA2741&journal_id=1001-3695&journal_name=计算机应用研究&referenced_num=7&reference_num=11