【正文】 ............ 1 研究現(xiàn)狀 ......................................................................................................................... 1 目的和意義 ...................................................................................................................... 2 第 2 章 指紋圖像預(yù)處理 ................................................................................................................ 4 指紋的概述 ..................................................................................................................... 4 ....................................................................................................... 4 .............................................................................................................. 5 .............................................................................................................. 6 圖像平滑 ........................................................................................................................ 8 ....................................................................................................... 8 .......................................................................................................... 8 Matlab 仿真 ..........................................................................................10 圖像腐蝕 ....................................................................................................................... 11 ......................................................................................................... 11 .................................................................................................. 11 ......................................................................................................... 11 Matlab 仿真 ..........................................................................................12 圖像銳化 .......................................................................................................................13 .............................................................................................................13 .............................................................................................................14 算子 ..........................................................................................................15 Matlab 仿真 ...............................................................................15 灰度圖像二值化 .............................................................................................................20 ...........................................................................................20 Matlab 仿真 ...................................................................................20 指紋圖像骨架的細(xì)化 ......................................................................................................21 指紋圖像細(xì)化簡(jiǎn)介 ................................................................................................21 . 細(xì)化算法的 Matlab 仿真 ....................................................................................22 第 3 章 指紋特征的提取 ...............................................................................................................24 指紋圖像特征值的提取 ...................................................................................................24 指紋圖像偽特征值的剔除 ................................................................................................24 第 4 章 總結(jié)與展望 ......................................................................................................................26 總結(jié) ..............................................................................................................................26 展望 ..............................................................................................................................26 致謝 ............................................................................................................................................29 參考文獻(xiàn) .....................................................................................................................................28 福建農(nóng)林大學(xué)東方學(xué)院計(jì)算機(jī)科學(xué)系畢業(yè)設(shè)計(jì)（論文） 2 附錄 1 配準(zhǔn)函數(shù) Matlab 程序 .......................................................................................................30 附錄 2 Matlab 仿真程序 ..................................................................................................33 I 摘要 在信息化時(shí)代，身份鑒別將越來(lái)越重要，應(yīng)用也變得日益廣泛。本文將就指紋識(shí)別系統(tǒng)的圖像預(yù)處理進(jìn)行研究。 關(guān)鍵詞： 圖像預(yù)處理；圖像增強(qiáng)；平滑；配準(zhǔn)；二值化；細(xì)化 II Abstract In the information age, the authentication will be more and more important, the application has bee increasingly widespread. Fingerprint inherent physiological characteristics as a person, with the feasibility and practicality of its uniqueness and lifetime invariant characteristics of fingerprint recognition technology, fingerprint identification has bee the most convenient and the most popular, the most reliable authentication technology world. Based on the identification system of fingerprint recognition technology with its unique low cost and technical superiority is widely used in various occasions. Fingerprint image preprocessing the fingerprint identification premise, it39。 registration。 2．人員出入控制，如重要機(jī)關(guān)、單位、場(chǎng)所的人員出入控制。 5．私有設(shè)備的使用控制，如移動(dòng)電話、個(gè)人計(jì)算機(jī)以及汽車 等需要鑰匙的設(shè)備。據(jù)考古學(xué)家證實(shí)，早在原始社會(huì)晚期，指紋作為什么鑒別的工具已經(jīng)在我國(guó)開始應(yīng)用。現(xiàn)代指紋 識(shí)別起源于公元 1684~公元 1915。 1892年，弗朗西斯 電子計(jì)算機(jī)的出現(xiàn)促進(jìn)了采集技術(shù)的發(fā)展以及對(duì)指紋識(shí)別的研究，人們逐漸用指紋自動(dòng)識(shí)別代替人工的指紋識(shí)別。其共同的弱點(diǎn)是，不能有效及時(shí)的區(qū)分合法用戶，和通過非正常手段已經(jīng)獲得了這些東西的非法使用者。因此世界各國(guó)都在爭(zhēng)先研究和開發(fā)實(shí)用的指紋識(shí)別系統(tǒng)。該研究組已發(fā)表在 IEEE國(guó)際主流學(xué)術(shù)刊物和重要的國(guó)際會(huì)議的 SCI， EI檢索論文 40余篇，并于 20xx年榮獲國(guó)家科技進(jìn)步二等獎(jiǎng)，并出版了專著“生物特征 識(shí)別理論與應(yīng)用”一書。還有其他一些機(jī)構(gòu)和個(gè)人也從事這方面的研究。作為一個(gè)方向的紋理圖像，以計(jì)算的流動(dòng)方向的脊線，使用的波形投影的方法來(lái)提取的指紋圖像的脊線的圖像，然后使用形態(tài)濾波器細(xì)化圖像的平滑處理，圖像濾波，提取的特征點(diǎn)并刪除了偽特征點(diǎn)。 也有不少學(xué)者提出了其他的指紋特征提取算法，例如，一些學(xué)者提出了，基于神經(jīng)網(wǎng)絡(luò)