浙江大學碩士學位論文摘要

浙江大學碩士學位論文

摘要

@著社會經濟的發展，作為生物特征識別技術中一類的虹膜識別技術正在

興起，并顯示了很大的優越性，如虹膜特征在人的一生中均保持相當高的穩定

性；虹膜圖像的采集具有無侵犯性；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

本文詳細討論了虹膜識別系統的圖像采集、傳輸和圖像識別幾個部分。采 用數字式CMOS黑白圖像傳感器采集虹膜圖像；使用USB方式實現圖像傳感

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器和主機之間的數據傳輸：對采集的虹膜圖像，采用灰度投影方法尋找虹膜內

邊緣中心，通過邊緣檢測加鄰域判斷尋求若干虹膜內外邊緣點進行擬合，得到 虹膜內外圓參數，完成虹膜分割；采用求相關系數的方法進行識別判斷。試驗 表明這種方法快速、有效。

本文詳細介紹了虹膜識別系統的軟、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驅動程序和主機通訊程序)、Windows環境 下的圖像處理程序等；硬件部分包括CMOS數字圖像傳感器OV7110，EZ．USB 接口芯片AN213l等。

、／

關鍵詞：虹膜識別，、圖像處理；CMOS圖像傳感器i USB

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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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