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1、西北工業(yè)大學(xué)碩士學(xué)位論文指紋識(shí)別算法研究及其DSP實(shí)現(xiàn)姓名:陶芬申請(qǐng)學(xué)位級(jí)別:碩士專業(yè):信號(hào)與信息處理指導(dǎo)教師:李勇20060301摘要撂紋韻難一性幫不變性決定了它在身份認(rèn)涯中的重要地位。髓薔羝價(jià)位指紋采集儀的出現(xiàn)和高可靠性辣法的實(shí)現(xiàn),自動(dòng)指紋識(shí)別技術(shù)越來(lái)越深入到人們的生活和工作當(dāng)中。另一方面,出于數(shù)字信號(hào)處理器(DSP)的迅猛發(fā)展,已經(jīng)可以滿足圖像處理中的運(yùn)算量安濃。零義黃先討論了指紋識(shí)裂懿有關(guān)概念及鬻矮算法,然磊在鼗蒸鹺
2、上提蠢了~靜瀾拜j小波交換躬捂絞談澍新算法,該算法琴j翦l指紋靜子豢,l、波交抉系數(shù)遙謇鬟藏從廣義商斯分布
3、這一特點(diǎn)腳jil】,從而僅使用兩個(gè)參數(shù)就可代表指紋小波子帶的特征,并以此為指紋識(shí)別的特征進(jìn)行匹配。該算法的優(yōu)點(diǎn)在于:預(yù)處理算法簡(jiǎn)單、處理邋度快;算法的數(shù)據(jù)存儲(chǔ)量小(存儲(chǔ)6個(gè)數(shù),存儲(chǔ)量為24字節(jié)。近似于現(xiàn)階段“l(fā)D}密碼”方式豹數(shù)掇爨),適合實(shí)際瘦建。論文進(jìn)行了大_羹豹MATLAB仿真實(shí)驗(yàn),薺與磚統(tǒng)算法遺行了蛙能幫糖真結(jié)巢魄較。實(shí)驗(yàn)表嚼該簿法浚爨步驟麓單、遽魔快、識(shí)別率高。本文的指紋識(shí)別算法研究是毗TMS320VC5510DSK為硬件平靜進(jìn)行的,該硬件系統(tǒng)使用FPCt010指紋采集卡實(shí)時(shí)獲取指絨躅像,在DSP集成開(kāi)發(fā)環(huán)境CCS(Co
4、deComposerStudio)上進(jìn)毒亍算法的調(diào)試。本文奔紹了DSP實(shí)現(xiàn)的步驟以及實(shí)璦過(guò)鬃中疆旁編寫(xiě)疆注爨熬秘蘧、翟淳熬調(diào)演方法疆及采薅豹魏純策臻。結(jié)聚表明該算法存儲(chǔ)懋小、運(yùn)行速度快、識(shí)別率離、可靠性強(qiáng)。為指紋識(shí)別算法的發(fā)展提供了新的思路。關(guān)鍵詞:自動(dòng)指紋識(shí)嬲,特征提取,小波變換,DSP應(yīng)用ABSTRACTFingerprinthasimportantstateinidentityverificationforitsexclusivityandinvariability.Alongwiththeemergenceofthelow
5、costfingerprintsensorandtherealizationofthehighlyreliablealgorithm,theautomatedfingerprintidentificationtechniqueisappliedmoreandmoreinourlifeandwork.Ontheotherhand,becauseofthefastdevelopmentofthedigitalsignalprocessor(DSP),theDSPalreadycansatisfytherequestofaboundin
6、gcomputinginimageprocessing.Thispaperfirstdiscussestherelevantconceptandthetraditionalalgorithmoffingerprintverification,thenputforwardanewfingerprintverificationalgorithmbasedonwavelettransformation.ThisalgorithmisonthebaseOfthecharacterthatthewaveletsubbandcoefficie
7、ntapproximatelyobedienttothegeneralizedGaussiandensity.SotwoparameterscanrepresentthewaveletSU,bbandandcanbeusedtomatchfingerprintsasfingerprint’Scharacter.Thealgorithm’sadvangtageissimplityofpre-processingalgorithm,fastprocessingspeed;smalldatamemoryneededbythealgori
8、thm(needtosave6data,24byte.Beclosetothecapacityof‘ID+password’)'whichsuitrealapplication.ThepapercarriesonagreatdealofsimulationinMATLAB,andcomparestheperformanceofthisalgorithmwiththetraditionalalgorithm.Theresultofsimulationshowthatthisalgorithmhassimplesteps、fastsp
9、eedandhighidentificationrate.FingerprintverificationalgorithminthispaperisonthehardwareplatformofTMS320VC5510DSKandFPCI010fi