数学形态学ppt课件.ppt

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1、MorphologicalOperations形态学操作QuickExampleImagestakenfromGonzalez&Woods,DigitalImageProcessing(2002)ImageaftersegmentationImageaftersegmentationandmorphologicalprocessingOncesegmentationiscomplete,morphologicaloperationscanbeusedtoremoveimperfectionsinthesegmentedimageandprovideinf

2、ormationontheformandstructureoftheimageMorphologicalFiltersObjective:SpreadoutandShrinkimageregionsWhy?Removesmallregions----probablycreatedbynoise.MorphologicalFiltersObjective:SpreadoutandShrinkimageregionsWhy?FillupunnecessarycavitiesSmoothboundariesMorphologicalFiltersObjecti

3、ve:SpreadoutandShrinkimageregionsWhy?ExtractedgesContentsOncesegmentationiscomplete,morphologicaloperationscanbeusedtoremoveimperfectionsinthesegmentedimageandprovideinformationontheformandstructureoftheimageInthislecturewewillconsiderWhatismorphology?Simplemorphologicaloperation

4、sCompoundoperationsMorphologicalalgorithms1,0,Black,White?Throughoutallofthefollowingslideswhether0and1refertowhiteorblackisalittleinterchangeableAllofthediscussionthatfollowsassumessegmentationhasalreadytakenplaceandthatimagesaremadeupof0sforbackgroundpixelsand1sforobjectpixelsA

5、fterthisitdoesn’tmatterif0isblack,white,yellow,green…….WhatIsMorphology?Morphologicalimageprocessing(ormorphology)describesarangeofimageprocessingtechniquesthatdealwiththeshape(ormorphology)offeaturesinanimageMorphologicaloperationsaretypicallyappliedtoremoveimperfectionsintroduc

6、edduringsegmentation,andsotypicallyoperateonbi-levelimagesQuickExampleImagestakenfromGonzalez&Woods,DigitalImageProcessing(2002)ImageaftersegmentationImageaftersegmentationandmorphologicalprocessingStructuringElements,Hits&FitsBACStructuringElementFit:Allonpixelsinthestructuringe

7、lementcoveronpixelsintheimageHit:AnyonpixelinthestructuringelementcoversanonpixelintheimageAllmorphologicalprocessingoperationsarebasedonthesesimpleideasStructuringElementsStructuringelementscanbeanysizeandmakeanyshapeHowever,forsimplicitywewilluserectangularstructuringelementswi

8、ththeiroriginatthemiddlepixel11111111100