Slides_Chapters_1_to_22PPT英文课件Slides_Chapter01

Chapter1Introductionandoverview,PracticalImageandVideoProcessingUsingMATLAB,ByOgeMarquesCopyright2011byJohnWileyforcolorimages,threevalues(usuallyrepresentingtheamountofred(R),green(G),andblue(B)arerequired.,Basicconcepts,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,Whatisdigitalimageprocessing?Itisthescienceofmodifyingdigitalimagesbymeansofadigitalcomputer.Afewremarks:Sinceboththeimagesandthecomputersthatprocessthemaredigitalinnature,wewillfocusexclusivelyondigitalimageprocessinginthisbook.Thechangesthattakeplaceintheimagesareusuallyperformedautomaticallyandrelyoncarefullydesignedalgorithmstocarryoutsuchtasks.,Basicconcepts,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,Whatarethegoalsofimageprocessingalgorithms?Imageprocessingalgorithmsareusuallydesignedtoimprovethesuitabilityoftheimageinordertoeither:enablehumaninterpretation,ormakeitmoresuitabletofurtheranalysisandautomaticextractionofsomeofitscontents.Sometimesthesegoalscanbeatoddswitheachother.Example:Sharpeninganimagetoallowinspectionofadditionalfine-graineddetails(betterforhumanviewing)vs.Blurringanimagetoreducetheamountofirrelevantinformation(betterforamachinevisionsolution).,Basicconcepts,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,3levelsofimageprocessingoperations:Low-level:primitiveoperations(e.g.,noisereduction,contrastenhancement,etc.)whereboththeinputandoutputareimages.Mid-level:extractionofattributes(e.g.,edges,contours,regions,etc.)fromimages.High-level:analysisandinterpretationofthecontentsofascene.,Examplesofimageprocessinginaction,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,Sharpening,Examplesofimageprocessinginaction,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,Noiseremoval,Examplesofimageprocessinginaction,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,Deblurring,Examplesofimageprocessinginaction,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,Edgeextraction,Examplesofimageprocessinginaction,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,Binarization,Examplesofimageprocessinginaction,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,Blurring,Examplesofimageprocessinginaction,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,Contrastenhancement,Examplesofimageprocessinginaction,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,Objectsegmentationandlabeling,ComputerImagingSystems,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,ComputerImagingSystems,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,HardwareAcquisitiondevices:scanners,sensors,cameras,camcorders,etc.Processingequipment:computers,workstations,specializedhardware,etc.Displayandhardcopydevices:monitors,printers,etc.Storagedevices:magneticdisks,opticaldisks,etc.SoftwareModulesthatperformspecializedtasks,e.g.:MATLABanditstoolboxes.Java,ImageJ,anditsplugins.,MachineVisionSystems,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,MVSvs.HVS,ByOgeMarquesCopyright2011byJohnWiley&Sons,Inc.Allrightsreserved.,Whyisitsohardtoemulatetheperformanceofthehumanvisualsystem(HVS)usingcamerasandcomputers?VerylargedatabaseofimagesandassociatedconceptsVeryhighspeedAbilitytoworkunderawiderangeofconditionsMostMVSmustimposenumerousconstraintsontheoperatingconditionsofthescenetoimprovetheirchancesofsuccess.