0001 0002 function [Results]=svr_dct(Im,bits,entropiad,epsilonv,H,perfil,sepsigno) 0003 0004 Lb=16; 0005 Li=length(Im); 0006 0007 R=1:(Lb*Lb-1); R=R(:); 0008 N=length(R); 0009 0010 C=40000; 0011 D = ones(1,N); D = D(:); 0012 0013 Results=[]; 0014 0015 for x=1:length(entropiad) 0016 0017 epsilon=epsilonv(x); 0018 ImR=rand(Li); 0019 0020 entropiat=10; 0021 umbral=0.005; 0022 iter=0; 0023 0024 while (abs(entropiad(x)-entropiat)> umbral) & (iter < 30) 0025 signoscoefs=[]; 0026 0027 betasc=[]; 0028 BtC=[]; 0029 Coef11=[]; 0030 SVs=[]; 0031 lSVs=[]; 0032 0033 fprintf('Training all the blocks of the local DCT'); 0034 0035 for i=1:Lb:Li 0036 fprintf('.'); 0037 for j=1:Lb:Li 0038 0039 B=Im(i:(i+(Lb-1)),j:(j+(Lb-1))); 0040 B=dct2(B); 0041 Coef11=[Coef11;B(1,1)]; 0042 B=zigzag(B); 0043 B=B(2:end); 0044 BtC=[BtC;B']; 0045 0046 bitsig=getsign(B,Lb); 0047 signoscoefs = [signoscoefs; bitsig]; 0048 0049 [nsv,beta,bias] = irwls_pd_svr_nobias(R,abs(B),H,C,D,epsilon,perfil); 0050 0051 betasc=[betasc;beta']; 0052 0053 end 0054 end 0055 0056 fprintf('\n'); 0057 0058 MM=max(max(abs(betasc))); MM=MM/4; 0059 0060 if (MM>0) 0061 0062 NumNiv = 2^bits; 0063 0064 betascr = round( NumNiv * betasc/MM)*MM/NumNiv; 0065 0066 signos = zeros(size(signoscoefs)); 0067 signos(logical(betascr~=0))=signoscoefs(logical(betascr~=0)); 0068 0069 entropc = []; 0070 entrops = []; 0071 0072 codigon = betascr.*(~signos) - betascr.*(signos); 0073 for i=1:Lb^2 0074 0075 if sepsigno==0 0076 codigo = betascr(i,:).*(~signos(i,:)) - betascr(i,:).*(signos(i,:)); 0077 [rlePesos,repCeros] = rle2(codigo); 0078 entropc = [entropc length(rlePesos)*entropiv(rlePesos)+length(repCeros)*entropiv(repCeros)]; 0079 entrops = 0; 0080 else 0081 0082 [rlePesos,repCeros] = rle2(betascr(i,:)); 0083 entropc = [entropc length(rlePesos)*entropiv(rlePesos)+length(repCeros)*entropiv(repCeros)]; 0084 0085 [rlePesoss,repCeross] = rle2(signos(i,:)); 0086 entrops = [entrops length(rlePesoss)*entropiv(rlePesoss)+length(repCeross)*entropiv(repCeross)]; 0087 end; 0088 0089 end 0090 0091 entropcn = sum(entropc)/Li^2; 0092 entropsn = sum(entrops)/Li^2; 0093 0094 entropiat= entropcn + entropsn; 0095 iter=iter+1; 0096 0097 epsilon = variacion_epsilon(entropiad, entropiat, epsilon); 0098 fprintf(' It. = 0099 0100 else 0101 entropiat=0; 0102 epsilon = epsilon/2; 0103 fprintf(' It. = 0104 0105 end 0106 end 0107 0108 z=1; 0109 0110 for i=1:Lb:Li 0111 for j=1:Lb:Li 0112 0113 y=H*betascr(z,:)'; 0114 0115 y=obtainsign(y, signos, Lb,z); 0116 0117 A=dezigzag([Coef11(z);y]); 0118 0119 A=idct2(A); 0120 0121 ImR(i:(i+(Lb-1)),j:(j+(Lb-1)))=A; 0122 0123 z=z+1; 0124 0125 end 0126 end 0127 0128 [mse,SNRi]=emse2(Im,ImR); 0129 esesim = ssim_index(Im,ImR); 0130 0131 [MSE,d_l,dx0,MPEx0,MPEoo0,MPEexpesp0] = disdis_lineal(Im,ImR,2,[3 mean(mean(Im))],2,2); 0132 mpelin = d_l; 0133 0134 [MSE,d,dx,MPEx,MPEoo,MPEexpesp] = disdis7(Im,ImR,[3 mean(mean(Im))],1,0.5,2,2); 0135 mpenonlinJMLR= d; 0136 0137 [MSE,d,dx,MPEx,MPEoo,MPEexpesp] = disdis7(Im,ImR,[3 mean(mean(Im))],2,1,2,2); 0138 mpenonlin= d; 0139 0140 Results = [Results;struct('bits',bits,'epsilon',epsilon,'NumNiv',NumNiv, ... 0141 'MSE',mse,'SNR',SNRi,'MPElin',mpelin,... 0142 'MPEnonlinJMLR',mpenonlinJMLR,'MPEnonlin',mpenonlin,... 0143 'ssim',esesim,'Entropy',entropiat, ... 0144 'entropiasig',entropsn,'entropiapes',entropcn,'Image',ImR,... 0145 'VecSopCuant',betascr,'VecSop',betasc,'Perfil',epsilon./perfil,... 0146 'Kernel',H,'C',C,'Code',codigon)]; 0147 0148 end 0149