浙江大學(xué)碩士學(xué)位論文摘要

浙江大學(xué)碩士學(xué)位論文

摘要

@著社會(huì)經(jīng)濟(jì)的發(fā)展，作為生物特征識(shí)別技術(shù)中一類(lèi)的虹膜識(shí)別技術(shù)正在

興起，并顯示了很大的優(yōu)越性，如虹膜特征在人的一生中均保持相當(dāng)高的穩(wěn)定

性；虹膜圖像的采集具有無(wú)侵犯性；瞳孔的縮放使虹膜組織具有活體組織的顯

著特征，可以有效的防止人工偽造等等。4

本文詳細(xì)討論了虹膜識(shí)別系統(tǒng)的圖像采集、傳輸和圖像識(shí)別幾個(gè)部分。采 用數(shù)字式CMOS黑白圖像傳感器采集虹膜圖像；使用USB方式實(shí)現(xiàn)圖像傳感

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器和主機(jī)之間的數(shù)據(jù)傳輸：對(duì)采集的虹膜圖像，采用灰度投影方法尋找虹膜內(nèi)

邊緣中心，通過(guò)邊緣檢測(cè)加鄰域判斷尋求若干虹膜內(nèi)外邊緣點(diǎn)進(jìn)行擬合，得到 虹膜內(nèi)外圓參數(shù)，完成虹膜分割；采用求相關(guān)系數(shù)的方法進(jìn)行識(shí)別判斷。試驗(yàn) 表明這種方法快速、有效。

本文詳細(xì)介紹了虹膜識(shí)別系統(tǒng)的軟、硬件。軟件部分包括USB通訊程序(基 于AN213 l的嵌入式程序、EZ．USB驅(qū)動(dòng)程序和主機(jī)通訊程序)、Windows環(huán)境 下的圖像處理程序等；硬件部分包括CMOS數(shù)字圖像傳感器OV7110，EZ．USB 接口芯片AN213l等。

、／

關(guān)鍵詞：虹膜識(shí)別，、圖像處理；CMOS圖像傳感器i USB

塑查查蘭塑主蘭堡堡奎

塑查查蘭塑主蘭堡堡奎一一一一一

Abstract

Iris recognition．a kind of biological characteristiC recogniti()n， springs up as a result of the social and economical development，and it shows great advantages．For example，the characteristics of one’s iriS are steady all one’s 1ife，the capturing of iris image is non—invasive， and issues of iriS possess the characters of 1 iving issues on account of

the zooming process of pupilS，which prevents counterfeiting．

The image capturing，image transmission and image processing of iriS recognition systems are expatiated in this paper．Iris images are captured

with CMON black-and—white digital camera．Then data are transmitted from

camera to host computer by USB interface．After that，the center of iriS inner circle is gotten with gray—level projecting，and curving fitting iS performed after a certain number of points on the iriS inner and outer edges are found by edge detection and neighborhood judgment，SO that the jriS is segmented．Finally，the correlating indexes are calculated to make the decision．Experimental results show the speediness and feasibi 1 i ty of thiS approach．

Both the hardware and software of iriS recognition system are discussed in detailS．The software includes the USB communication component(the embedded program based on AN2131，EZ—USB driver and host

computer communication program)and the image processing programs in

Windows environment．The hardware includes the CMOS black—and-white

digi ta]camera or7I 10 an

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