信号图像处理课件：Chapter 3 Intensity Transformation and Spatial Filtering

Chapter3

IntensityTransformationand

SpatialFilteringPart1:IntensityTransformation3.1Background3.1.1IntensityTransformg[x,y]=T[f[x,y]],Tisaunaryfunction3.1.2SpatialFiltering3.1.2SpatialFiltering*554474443#0-10-15-10-10*0*-1*0*-1*5*-1*0*-1*03.1.2SpatialFilteringImageEnhancementEnhancementistheprocessofmanipulatinganimagesothattheresultismoresuitablethantheoriginalforspecificapplication.3.2SomeBasicIntensityTransformFunctions3.2SomeBasicIntensityTransformFunctions3.2.1ImageNegatives=L-1-r3.2.2LogTransformations

s=clog(1+r),r>=03.2.2Power(Gamma)Transformations3.2.2Power(Gamma)Transformations[Programming]Howtoaccelerate?3.2.2Power(Gamma)Transformations3.2.2Power(Gamma)Transformations3.2.3Power(Gamma)Transformations3.2.4Piecewise-LinearTransformationFunctionsI-ContraststretchingThresholding3.2.4Piecewise-LinearTransformationFunctionsII:Intensity-levelslicing3.2.4Piecewise-LinearTransformationFunctionsII:Intensity-levelslicing3.2.4Piecewise-LinearTransformationFunctionsIII:Bit-planeslicing3.2.4Piecewise-LinearTransformationFunctionsII:Bit-planeslicingBit-planeslicing[Programming]Bit-planeslicing[Drawthebit-planeslicingfunctioncurve]3.2.4Piecewise-LinearTransformationFunctionsII:Bit-planeslicing3.2.4BrightnessTransformationBasic g[x,y]=f[x,y]+c g[x,y]=kf[x,y]SaturationO