摘要:作為智能交通系統(tǒng)的重要組成部分，車牌自動(dòng)識(shí)別系統(tǒng)在現(xiàn)代交通領(lǐng)域研究中占有重要的地位，而對(duì)車牌定位的速度和效率也決定著車牌識(shí)別系統(tǒng)對(duì)車牌的的識(shí)別率，對(duì)其相關(guān)技術(shù)的研究逐漸受到人們的重視。因此，對(duì)車牌定位系統(tǒng)的研究有著重要的理論和現(xiàn)實(shí)意義。本文采用了一種由數(shù)學(xué)形態(tài)學(xué)和投影算法相結(jié)合的車牌定位方法，定位過程由以下幾個(gè)步驟實(shí)現(xiàn)：首先，是對(duì)車牌的預(yù)處理，它包括車牌的灰度化，圖像去噪等；采后采用數(shù)學(xué)形態(tài)學(xué)算子進(jìn)行車牌車牌粗定位以提取車牌候選區(qū)域,設(shè)計(jì)出一個(gè)比較完整的車牌定位系統(tǒng)，并在理論的基礎(chǔ)上，運(yùn)用MATLAB對(duì)相應(yīng)算法進(jìn)行編程實(shí)現(xiàn)。為車牌識(shí)別系統(tǒng)中車牌字符分割和車牌識(shí)別打下了堅(jiān)實(shí)的基礎(chǔ)，實(shí)驗(yàn)結(jié)果表明，采用該算法進(jìn)行車牌自動(dòng)定位可取得較好的效果。

關(guān)鍵詞：圖像增強(qiáng) 邊緣檢測 車牌定位

ABSTRACT:As one of the significant part of Intelligent Transport Systems, License Plate Automatic Recognition occupies an important place in the study of the field in modern traffic, which is being taken more seriously in the research of its related technology. So，It's important to research the plate location system for theoretical and practical significant. This paper presents a license plate location based on projection which associate with mathematical morphology. Location processing is came true by the following steps: first of all, processing of the license plate image, image denoising, an so on; then, use morphological operators for license plate region’s rough detection, the paper has designed an intact license Plate Recognition system. On the premise of constructing a theory, the paper has programmed corresponding algorithms in the environment of MATLAB. It's laid a solid foundation for  the license plate character segmentation and license plate recognition ,The experimental results show that this algorithm is suitable for license plate location and recognition. 

Keywords：Image enhancement; Edge detection; License plate location;

伴隨著全國各地的汽車數(shù)量的增加，城市交通狀況日益受到了人們的熱烈關(guān)注，汽車車牌識(shí)別系統(tǒng)是交通管理系統(tǒng)中重要的一個(gè)部分。因此，汽車車牌自動(dòng)識(shí)別系統(tǒng)的研究與開發(fā)一直都是現(xiàn)代社會(huì)研究的熱點(diǎn)內(nèi)容之一。也是制約交通管理智能化、現(xiàn)代化的重要因素。而車牌定位系統(tǒng)是車牌識(shí)別系統(tǒng)中的關(guān)鍵技術(shù)之一，因此，對(duì)車牌定位系統(tǒng)的研究有著重大的意義。