Labview毕业论文

诚信声明我声明，所呈交的毕业论文是本人在老师指导下进行的研究工作及取得的研究成果。据我查证，除了文中特别加以标注和致谢的地方外，论文中不包含其他人已经发表或撰写过的研究成果，也不包含为获得其他教育机构的学位或证书而使用过的材料。我承诺，论文中的所有内容均真实、可信。毕业论文作者签名：签名日期：年月日相机的控制、自动对焦与图像采集技术的研究[摘要]自动对焦技术在工业生产和科研工作有着十分重要的意义。本论文主要工作是设计了一套自动对焦程序，通过对拍摄对象特定检测区域进行边缘检测和边缘点统计，可确定离焦程度，再自动调整摄像头向最佳对焦位置靠近，最终实现自动对焦。该程序主要采用了边缘检测和爬山法算法。要实现自动对焦通常要解决自动定位问题，自动定位目的是确定拍摄对象的平面位置，以便能准确计算出检测区域。以拍摄对象中有关键特征的部分作为匹配模板，就可以采取模板匹配的方法实现自动定位。自动对焦技术可应用在工业生产线上，例如实现机器手准确抓取工件的功能。程序设计选择利用NILabVIEW8.6和NIvision图像处理函数库。此外，论文还论述了相机控制的内容[关键词]LabVIEW；机器视觉；自动对焦；图像处理ResearchonCameraControl,AutoFocusandImageAcquisition[Abstract]Autofocustechnologyisofgreatsignificanceonindustrymanufactureandscientificresearch.Themainworkofthispaperistodesignasetofautofocusprogram,whichcanevaluatetheleveloffocusdeviatebytakingapictureonasurveyedareaoftheobjectforedgedetectionandedgepointstatistics.Thentheprogramwillautomaticallyadjustthecameratowardsthelocationofbestfocusandeventuallyachieveautofocus.Theprogrammostlyusestheedgedetectionandclimbmountainsarithmetic.Usually,toachieveautofocusweneedsolvetheautomaticlocationproblem.Theautomaticlocationisdesignedtomeasuretheplanepositionofanobject,whichaimstoexactlyfigureoutthesurveyedarea.Usingapartwithkeyfeatureintheobjectasmatchingtemplate,wecanadoptthetemplatematchingmethodtoachievetheautomaticlocation.Theautofocustechnologyhasanextensiveapplicationarea,suchasusedintheindustryproductionlinetoachievetheexactlygrabbingworkpiecewithamechanicalhand.ThisprogramisbaseontheNILabVIEW8.6developmentplatformandNIvision8.6imagedisposingfunctionlibrary.Whatismore,thepaperalsotalksaboutthecameracontrol.Keywords:LabVIEW;MachineVision;AutoFocus;ImageDisposing;目录1绪论...................................................................................................................11.1虚拟仪器概述..................................................................................................................21.2关于本课题的研究背景..................................................................................................41.2.1课题意义.......................................................................................................................41.2.2自动对焦技术的发展现状...........................................................................................62LABVIEW程序设计技术...............................................................................72.1LABVIEW软件介绍........................................................................................................72.2LABVIEW的基本模块....................................................................................................72.3程序调试技术.....................................................................................................................................83程序设计算法分析..........................................................................................113.1基于边缘检测的自动对焦算法....................................................................................113.2爬山法分析....................................................................................................................113.3查表法分析....................................................................................................................154基于边缘检测的自动对焦程序设计.............................................................164.1程序设计思想................................................................................................................164.1.1程序总体.....................................................................................................................164.1.2程序初始化工作.........................................................................................................184.1.3定位程序模块.............................................................................................................194.1.4边缘检测参数设置.....................................................................................................204.1.5检测区域的设置.........................................................................................................204.1.6检测过程记录.............................................................................................................224.1.7检测区域拍摄对焦特性图.........................................................................................224.1.8测量结果.....................................................................................................................224.1.9图像信息显示.............................................................................................................234.2基于边缘检测的自动对焦程序重点的分析...............................................................244.2.1图像对焦距离及随机选择程序........................................................................................244.2.2水平检测线调整程序......................................................................................................254.2.3垂直线绘制程序.............................................................................................................254.2.4边缘点等参数计算程序..................................................................................................254.2.5多检测线边