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源代码
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% N& N6 E# H" M* h6 T9 t* J/ jclear all
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3 _2 F; _# g8 n, C0 Qim = imread(‘1.bmp’);
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quality = CCF(im)+ [1 E& P! s4 a6 D+ `
function [quality] = CCF(im)1 g- y, A, P) Y( O
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%-------------CCF_coloRFulness -----------------
. `9 S; s, |' @, ~8 {/ X' mimColor = double(im);
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' B1 g( c# S e, M9 B3 f- 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----------------------; V: x6 b: O% D( r2 X2 j* r
& @; L3 Z; `6 _2 M- im1=rgb2gray(im);
- CCF_contrast = CCFcontrast(im1);/ I3 Q" T! h' R
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%-------------CCF_FADE--------------------------- @6 ~; R( x. n2 b" \$ U
! ?; c" c7 [/ j0 I1 |, r- CCF_FADE = FADE(im);; ]' j! |4 k( c$ s6 `. ?' [( Q& ?; s
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+ ~7 ^) Z) c' U%------------ normalization ------------------6 i7 |& N: b" L. U' ~
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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);1 S4 P1 u3 R+ T; b" i
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: n, V: s L; @% ------------calculate image quality with coefficients---------------------$ h; j* @4 z4 B% F- p
+ J! U0 ?- A9 P7 q3 X- c=[0.17593 0.61759 0.33988 ];
- quality = c(1)*(CCF_colorfulness) + c(2)*(CCF_contrast) + c(3)*(CCF_FADE)( m+ ]' L+ }5 h8 ~- G
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发表于 2021-4-22 17:28
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