1、中國(guó)農(nóng)業(yè)大學(xué)博士學(xué)位論文基于計(jì)算機(jī)視覺的播種精度檢測(cè)技術(shù)研究姓名：李偉申請(qǐng)學(xué)位級(jí)別：博士專業(yè)：車輛工程指導(dǎo)教師：毛恩榮20040601AbstractSeedinguniformityisanimportantfactortOevaluateperformanceandqualityofseedersThecomprehensiveseedingaccuracytestingmethodproposedinthisdissertatio

2、ntotestperformanceofprecisionseedergraindrillseederhilldropplanterseedingmonomer，andseedsowingdeviceisanintegrativeonewithtechnologyofcomputervision，patlerrecognition，andautomaticcontr01Thecoretaskisapplicationofcomputer

3、visiontechniquesinseedingaccuracydynamicaltestingAccurateandreliableseedingaccuracytestandautomaticcontrolofthetest—bedarerealizedMainstudycontains：1AseederperformancetestsystembasedoncomputervisionisbuiltPrecisionseeder

4、graindrillseederhilldropplanterseedingmonomerandseedsowingdeviceforthefirsttimearerealizetobetestedononecomprehensivetestbed，andatthesametime，hardproblemofevaluatingseedingaccuracyfromseedkernelspaceintervalissolvedTestr

5、esultsareaccurate，reliableandCanbetracedtothesource2ConstructionmethodofdynamicalimageacquisitionisstudiedFieldbyfieldandframeabsentimageacquisitionmethodisusedtemoveredundantinformationandsavingcomputermemoryThethreepri

6、marycolorchannelsofcolorimageareseparatelycapturedtotheimageacquisitionboardbyusingspecialhardwareandsofiwaretechnologythereforethreelinesofseedsareparallelcapturedContrastivetestisdonetocompareadvantageanddisadvantageof

7、thresholdchosenmethod，whichCaneitherbechosenfromtryingoriteration，andpredefinedthresholdchosenisselected，whichresultinlessenprocessingtimeRegionlabelingusingsequentialalgorithmandseedobjectrecognitionarestudied，andthenth

8、ecenterofaregioniscalculated，3SequentialimagesmatchingandsplicingtechnologyisstudiedBeginwithrealtimerequirementofdynamicaltesting，imagesplicingproblemisfurtherresearchedandprincipleofimagesplicingisexpoundedAnewsequenti

9、alimagessub—splicingmethodisproposed，whichbasedonfeaturesofmarkersandaimedatlookingforthesamemarkersinoverlappedareaoftwoadjacentimagestofinishthesplicingtaskNealimagecoalescenceisdone，buttheredundantinformationisdiminis

10、hed，SOthetwoadjacentimagesareconsideredwellsplicedBigmarksareinterlacedwithsmallonestorealizeaccurateimagesubsplicinginrealsituationInfluenceofthewidthofoverlappedareaonimagesplicingisstudiedanditswidthsettingmodeisgiven

11、4ConstructionoftheilluminationsystemandcameracalibrationmeansareresearchedIlluminationsystemconstructionofcomputervisionsystemisstudiedandadoublelinespacecrossingilluminationsystemisbuilt，whichresultsineffectivesettlemen

12、tofdisparitybetweenilluminationsystemandimageacquisitioninmovingobjecttestingproblemDataaccuracywhenusingthreecamerastocaptureinformationisfurtherresearched，andthreecamerassystemerrormoduleandcalibrationmethodaredefetrai