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ID:39140889
大小:1.84 MB
页数:65页
时间:2019-06-25
《在智能手机上实现二维条形码识别》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、在智能手机上实现二维条形码识别上海师范大学硕士学位论文AbstractInthisthesis,itintroducedasolutionmethodofPDF417barcoderecognitionbyuseofthecamerafunctioninaSmartphoneaccordingtoapracticalprojectwork.ThealgorithmofBarcodeimagerecognitionwasappropriatelydesignedbythesoftwareandhardwarestructureofacellphoneandhasbeenfinallyrealiz
2、edinaLinuxSmartphone.Inthefirstsession,itanalyzedthedevelopmenttrendoftwo—dimensionbarcodeapplication,introducedthestructureofPDF417,comparedSmartphone’Sstructurewiththespecifiedbarcodereaders’,analyzedtheCPUcomputeabilityofaSmartphoneandtheconditionfeaturesoftheembeddedLinux.Ascellphonesarenotdesig
3、nedforimagerecognition,theiropticalcharacteristicandcomputeabilityaremuchinferiortothespecifledbarcodereaders.Itmeanstheclassicalalgorithmofbarcoderecognitionisnotquitesuitableforcellphones,whileusingthecellphoneasabarcodereader,alotofpeculiarproblemshaveoccurred.Thesepeculiarproblemsarewhathavebeen
4、mainlyanalyzedinthispart.Inthefollowingsession,itpresentedanalgorithmofPDF417two—dimensionbarcoderecognitioncustomizedforaLinuxmodelaccordingtotheanalysisconclusion.Thespecialpointofthealgorithmis:itsolvestheopticaldegradationproblemubiquitousinthecamerapatternassemblyofcellphonesandpresentstheimage
5、restorationsolutionbyuseoftheverylimitedprocessorresource:itisasmallcalculatedamountandlowmemoryassumptionbarcoderecognitionalgorithmbytheapplicationprocessorcharacteristicofcellphones.Itresolvedtheconflictbetween“thelargecalculatedamountofimagerecognitionandthehighmemoryassumption”with“thesmallcomp
6、uteabilityoftheembeddedprocessandthe1imitedmemoryspace”.Keywords:two—dimensionbarcode,PDF417,imagerecognition,SmartPhone2在智能手机上实现二维条形码识别上海师范大学硕士学位论文第1章绪论1.1概述智能手机的定义智能手机的定义,简而言之就是:有开放操作系统的手机【11。智能手机除了具备手机的通话功能外,还具备了PDA的大部分功能,特别是个人信息管理以及基于无线数据通信的浏览器和电子邮件功能。主流手机操作系统有:Symbian、Windowsmobile、Linux、Palm【2
7、】等。由于项目背景的关系,本文的实现部分是在一款Linux手机上进行的。表1.1常见的手机操作系统及其对比【2】常见手机操作系统市场占有率特点Symbian很大,超过50%小规模的操作系统,对硬件配置要求低,性能上存在局限性依托PC版的技术与知名度,Windows/dobile中,20%左右容易使用,对硬件配置要求高,价格高Linux中,但小于WindowsMobile部分免费、开放源代码,但应用
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