信號圖像處理課件：Chapter 6-2 Part 2 Pseudo color Image Processing

Chapter6ColorImageProcessingPart2PseudocolorImageProcessing6.3PseudocolorImageProcessing

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】VeryUsefulToolforDataVisualizationInputf(x,y):grayscaleimageOutputgc(x,y):colorimagegc(x,y)={r(x,y),g(x,y),b(x,y)} r(x,y)=R(f(x,y)) g(x,y)=G(f(x,y)) b(x,y)=B(f(x,y))6.3PseudocolorImageProcessingPseudocolorImageProcessingIntensitySlicingPseudocolorImageProcessingIntensitySlicingPseudocolorImageProcessingIntensitySlicingPseudocolorImageProcessingPseudocolorImageProcessingPseudocolorImageProcessing6.4FullColorImageProcessing6.4.1FundamentalsWhatisfullcolorimageprocessing? Inputf(x,y):ColorImage Outputg(x,y):ColorImage6.4FullColorImageProcessing6.4.2BasedonRGBModelInput:{fr(x,y),fg(x,y),fb(x,y)}Output gr(x,y)=T(fr(x,y));gg(x,y)=T(fg(x,y)); gb(x,y)=T(fb(x,y));T:BasicIntensitytransform,averageblur,GaussianBlur,SharpeningFilter6.4FullColorImageProcessing6.4.2BasedonRGBModelInput:{fr(x,y),fg(x,y),fb(x,y)}Output gr(x,y)=Tr(fr(x,y));gg(x,y)=Tg(fg(x,y)); gb(x,y)=Tb(fb(x,y)); Adjustsomechannels6.4FullColorImageProcessing6.4.3BasedonHSV

Model Hue/Saturation/ValueModelV=max(R,G,B)S=(max-min)/max

ifR=max,H=(G-B)/(max-min)

ifG=max,H=2+(B-R)/(max-min)

ifB=max,H=4+(R-G)/(max-min)

H=H*60

ifH<0,H=H+360

6.4FullColorImageProcessing

ifs=0

R=G=B=V

else

H/=60;

i=INTEGER(H)

f=H-i

a=V*(1-s)

b=V*(1-s*f)

c=V*(1-s*(1-f))

switch(i)

case0:R=V;G=c;B=a;

case1:R=b;G=v;B=a;

case2:R=a;G=v;B=c;

case3:R=a;G=b;B=v;

case4:R=c;G=a;B=v;

case5:R=v;G=a;B=b;6.4FullColorImageProcessing6.4.3BasedonHSV

Model VChannel:GraylevelImageProcessing: Intensitytransform, averageblur GaussianBlur SharpeningFilter HistogramEqualization 6.4FullColorImageProcessing6.4.3BasedonHIS(HSV)

Model SChannel: IncreaseorDecreaseSaturation6.4FullColorImageProcessing6.4.3BasedonHSV

Model HChannel: addoperation:changeimagehue

6.4FullColorImageProcessing6.4.3BasedonYUVModel YChannel:GraylevelImageProcessing: Intensitytransform, averageblur GaussianBlur SharpeningFilter HistogramEqualization 6.4FullColorImageProcessing6.4.3BasedonColorTransformMatrix6.4FullColo