CAJ | 학술논문

基于先验知识，根据车牌与车标的相对位置关系，首先对车标进行粗定位，得到包含车标图案的矩形粗定位区域。为了利用车标背景散热片的纹理方向特征，引入纹理方向测度的概念。根据纹理测度将散热片纹理分为两大类：类水平纹理和垂直纹理。在精定位阶段，对于不同的纹理类型采用不同的定位方法：对于类水平纹理，采用动态模板定位边界，对复杂水平纹理和复杂网状纹理具有良好的定位效果；对于垂直纹理，引入边缘颗粒度的概念，既有效地消除非车标区域的噪声点，又完整地保留车标本身的信息。实验结果表明，该方法鲁棒性好，能够快速、准确地定位车标位置，平均成功定位率为97％，在测试环境下平均定位时间为22 ms，定位效率和定位成功率能满足实时系统的需要。
기우선험지식，근거차패여차표적상대위치관계，수선대차표진행조정위，득도포함차표도안적구형조정위구역。위료이용차표배경산열편적문리방향특정，인입문리방향측도적개념。근거문리측도장산열편문리분위량대류：류수평문리화수직문리。재정정위계단，대우불동적문리류형채용불동적정위방법：대우류수평문리，채용동태모판정위변계，대복잡수평문리화복잡망상문리구유량호적정위효과；대우수직문리，인입변연과립도적개념，기유효지소제비차표구역적조성점，우완정지보류차표본신적신식。실험결과표명，해방법로봉성호，능구쾌속、준학지정위차표위치，평균성공정위솔위97％，재측시배경하평균정위시간위22 ms，정위효솔화정위성공솔능만족실시계통적수요。
Based on the prior knowledge and according to the relative position relationship of vehicle licence plate and vehicle-logo,first we make rough positioning of the vehicle logo and get a rectangular rough location region containing the vehicle-logo image.In order to utilise the texture directional feature of the vehicle-logo background cooling grills,we introduce the concept of texture direction measure.According to the texture measure,the textures of the grille are grouped into two categories:the horizontal-like texture and the vertical texture.In the stage of accurate location,we adopt different location algorithms in light of different texture categories respectively.For horizontal-like texture,we use dynamic templates to locate the boundary,this achieves sound location effects for sophisticated horizontal texture and complicated mesh texture;For vertical texture,we introduce the concept of edge granularity,it effectively removes the noises points outside the vehicle logo region and preserves entire information of the vehicle-logo its own.Experimental results show that the method in this paper has good robustness,it can fast and accurately locate the position of vehicle-logo,the average successful locating rate reaches 97%,and the average locating time is 22 ms in testing environment.This location efficiency and accuracy can meet the demand of real-time system.