基于matlab CCF算法的图像质量评价

haidaowang

源代码

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clear all
, `" {# o4 z; }7 h# _/ Tclc
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4 t& {0 H& G$ a& zim = imread(‘1.bmp’);
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quality = CCF(im)
' d$ W$ @: h4 c6 i# _function [quality] = CCF(im)

%-------------CCF_coloRFulness -----------------
8 Z( J$ Y; L* I$ B. eimColor = double(im);

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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);
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" o1 O" V" a( Z# k7 O%-------------CCF_contrast----------------------

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• im1=rgb2gray(im);
• CCF_contrast = CCFcontrast(im1);
  

* a8 \, C: s: V* @3 t3 c5 T$ m  e# I5 H%-------------CCF_FADE--------------------------

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• 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);
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& P3 F% N  }1 w6 \3 n% ------------calculate image quality with coefficients---------------------

• c=[0.17593 0.61759 0.33988 ];
• quality = c(1)*(CCF_colorfulness) + c(2)*(CCF_contrast) + c(3)*(CCF_FADE)
  

end
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NNNei256

基于matlab CCF算法的图像质量评价

twel2e

可以借鉴一下