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源代码7 y$ \. [! o# [
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clear all" D- B! g+ x/ }3 B" {/ H$ K, u) {
clc
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, o J d4 r3 S9 n* M0 gim = imread(‘1.bmp’);5 f7 k/ [. ^7 N d
1 E# [ Y5 v( y6 q/ _quality = CCF(im)
' K- B7 j- u' Mfunction [quality] = CCF(im)
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%-------------CCF_coloRFulness -----------------' @& C& M0 U' f! j5 }/ Z7 L% N2 a
imColor = double(im);
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$ A, l5 Q/ l2 P- 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);
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%-------------CCF_contrast----------------------
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+ f: ^$ _, B/ X- im1=rgb2gray(im);
- CCF_contrast = CCFcontrast(im1);
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%-------------CCF_FADE--------------------------8 v$ k, b+ x* v6 d$ C
, L/ O2 C. u4 j1 k, j- CCF_FADE = FADE(im);
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%------------ normalization ------------------
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- CCF_colorfulness=mapminmax(CCF_colorfulness,1,10);
- CCF_contrast=mapminmax(CCF_contrast,1,10);
- CCF_FADE=10-mapminmax(CCF_FADE,1,10);! [+ W+ v8 |# L& P7 g$ d( [- |
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% ------------calculate image quality with coefficients---------------------
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- c=[0.17593 0.61759 0.33988 ];
- quality = c(1)*(CCF_colorfulness) + c(2)*(CCF_contrast) + c(3)*(CCF_FADE)2 u! ?' J+ s4 z6 q/ e
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