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源代码) @ q- `5 t+ d$ h2 d) o
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clear all, u) p$ Q( S0 a, r! I
clc
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im = imread(‘1.bmp’);: [: m7 M/ M, p" M- G: v4 \
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quality = CCF(im)
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%-------------CCF_coloRFulness -----------------
. }& w' A Y" j5 V: u( p& M, EimColor = double(im);1 t$ e9 P7 [. d: F: T" @6 {- U- A
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- R = imColor(:,:,1);
- G = imColor(:,:,2);
- B = imColor(:,:,3);
- RR = log(R+0.00001) - mean2(log(R+0.00001));
- GG = log(G+0.00001) - mean2(log(G+0.00001));
- BB = log(B+0.00001) - mean2(log(B+0.00001));
- alpha = RR-GG;
- beta = 0.5*(RR+GG)-BB;
- mu_alpha=mean(mean(alpha));
- mu_beta=mean(mean(beta));
- var_alpha=var(var(alpha));
- var_beta=var(var(beta));
- CCF_colorfulness=1000*((sqrt(var_alpha+var_beta)+0.3*sqrt(mu_alpha*mu_alpha+mu_beta*mu_beta))/85.59);1 P d9 H' A6 c2 D
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%-------------CCF_contrast----------------------1 A8 h/ {, K5 C; w/ L% i. J
3 ]- }; a0 C" b9 J& a4 D5 _- im1=rgb2gray(im);
- CCF_contrast = CCFcontrast(im1);
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8 v$ `$ T9 n! s p2 Q%-------------CCF_FADE--------------------------
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- CCF_FADE = FADE(im);' m" S# k. M p: C
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%------------ normalization ------------------
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# c* B6 c+ h; z4 b% H- CCF_colorfulness=mapminmax(CCF_colorfulness,1,10);
- CCF_contrast=mapminmax(CCF_contrast,1,10);
- CCF_FADE=10-mapminmax(CCF_FADE,1,10);9 u5 @+ T! q. ?! |. R
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( U9 E" C$ ~6 O% ------------calculate image quality with coefficients---------------------
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- quality = c(1)*(CCF_colorfulness) + c(2)*(CCF_contrast) + c(3)*(CCF_FADE): A9 l8 W* X* w. \) g, g( H
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end
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