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SegmentationandBoundaryDetectionUsingMultiscale利用多尺分割和边界检测第1页/共64页LocalUncertainty第2页/共64页GlobalCertainty第3页/共64页LocalUncertainty第4页/共64页GlobalCertainty第5页/共64页CoarseMeasurementsforTexture第6页/共64页AChickenandEggProblemProblem:CoarsemeasurementsmixneighboringstatisticsSolution:supportofmeasurementsisdeterminedasthesegmentationprocessproceeds第7页/共64页

Normalized-cutsmeasureingraphsCompletehierarchyinlineartimeUsemultiscalemeasuresofintensity,texture,shape,andboundaryintegritySegmentationbyWeightedAggregation第8页/共64页Normalized-cutsmeasureingraphs

CompletehierarchyinlineartimeUsemultiscalemeasuresofintensity,texture,shape,andboundaryintegritySegmentationbyWeightedAggregation第9页/共64页SegmentationbyWeightedAggregationNormalized-cutsmeasureingraphsCompletehierarchyinlineartime

Usemultiscalemeasuresofintensity,texture,shapeandboundaryintegrity第10页/共64页ThePixelGraphCouplingsReflectintensitysimilarityLowcontrast–strongcouplingHighcontrast–weakcoupling第11页/共64页HierarchicalGraph第12页/共64页Hierarchy

inSWA第13页/共64页Normalized-CutMeasure第14页/共64页Normalized-CutMeasure第15页/共64页Normalized-CutMeasure第16页/共64页Normalized-CutMeasureMinimize:第17页/共64页Normalized-CutMeasureHigh-energycutMinimize:第18页/共64页Normalized-CutMeasureLow-energycutMinimize:第19页/共64页RecursiveCoarsening第20页/共64页RecursiveCoarseningRepresentativesubset第21页/共64页RecursiveCoarseningForasalientsegment:,sparseinterpolationmatrix第22页/共64页WeightedAggregationaggregateaggregate第23页/共64页SegmentDetection第24页/共64页SWALinearin#ofpoints(afewdozenoperationsperpoint)DetectsthesalientsegmentsHierarchicalstructure第25页/共64页Coarse-ScaleMeasurementsAverageintensitiesofaggregatesMultiscaleintensity-variancesofaggregatesMultiscaleshape-momentsofaggregatesBoundaryalignmentbetweenaggregates第26页/共64页Adaptivevs.RigidMeasurementsAveragingOuralgorithm-SWAGeometricOriginal第27页/共64页Ouralgorithm-SWAAdaptivevs.RigidMeasurementsInterpolationGeometricOriginal第28页/共64页RecursiveMeasurements:Intensityaggregateintensityofpixeli

averageintensityofaggregate第29页/共64页UseAveragestoModifytheGraph第30页/共64页UseAveragestoModifytheGraph第31页/共64页TextureExamples第32页/共64页IsotropicandOrientedFiltersTextonsbyK-MeansMaliketalIJCV2001Abrieftutorial第33页/共64页IsotropicTextureinSWAIntensityVarianceIsotropicTextureofaggregate–averageofvariancesinallscales第34页/共64页IsotropicTextureinSWAIntensityVarianceIsotropicTextureofaggregate–averageofvariancesinallscales第35页/共64页IsotropicTextureinSWAIntensityVarianceIsotropicTextureofaggregate–averageofvariancesinallscales第36页/共64页OrientedTextureinSWAShapeMomentsOrientedTextureofaggregate–orientation,widthandlengthinallscalescenterofmasswidthlengthorientationwithMeiravGalun第37页/共64页Gestalt–PerceptualGroupingAbriefTutorialSharon,Brandt,BasriPAMI2000:ShashuaandUllmanICCV1988:Groupcurvesby:ProximityCo-linearity第38页/共64页BoundaryIntegrityinSWA第39页/共64页SharpentheAggregatesTop-downSharpening:

ExpandcoreSharpenboundaries第40页/共64页Hierarchy

inSWA第41页/共64页ExperimentsOurSWAalgorithm(CVPR’00+CVPR’01)

run-time:5-10seconds.Normalizedcuts(ShiandMalik,PAMI’00;Maliketal.,IJCV’01)

run-time:about10-15minutes.

SoftwarecourtesyofDoronTal,UCBerkeley.imagesonapentiumIII1000MHzPC:第42页/共64页IsotropicTexture-HorseIOurAlgorithm(SWA)NormalizedCuts第43页/共64页IsotropicTexture-HorseIIOurAlgorithm(SWA)NormalizedCuts第44页/共64页IsotropicTexture-TigerNormalizedCutsOurAlgorithm(SWA)第45页/共64页IsotropicTexture-ButterflyOurAlgorithm(SWA)NormalizedCuts第46页/共64页IsotropicTexture-LeopardOurAlgorithm(SWA)第47页/共64页IsotropicTexture-DalmatianDogOurAlgorithm(SWA)第48页/共64页IsotropicTexture-SquirrelOurAlgorithm(SWA)NormalizedCuts第49页/共64页FullTexture-SquirrelOurAlgorithm(SWA)NormalizedCutswithMeiravGalun第50页/共64页FullTexture-CompositionOurAlgorithm(SWA)withMeiravGalun第51页/共64页FullTexture–LionCubOurAlgorithm(SWA)withMeiravGalun第52页/共64页FullTexture–PolarBearOurAlgorithm(SWA)withMeiravGalun第53页/共64页FullTexture–PenguinOurAlgorithm(SWA)withMeiravGalun第54页/共64页FullTexture–LeopardOurAlgorithm(SWA)withMeiravGalun第55页/共64页FullTexture-ZebraOurAlgorithm(SWA)withMeiravGalun第56页/共64页SegmentationbyWeightedAggregationEfficientapproximationtoNcut-likemeasuresRecursivecomputationofmultiscalemeasurementsNoveladaptivepyramidrepresentingtheimage第57页/共64页MatchingExperiment(ChenBrestel)第58页/共64页MatchingExperiment(ChenBrestel)第59页/共64页MatchingExperiment(ChenBrestel)第60页/共64页Experiments–ClusteringSilho

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