0001
0002
0003
0004
0005
0006
0007
0008
0009
0010
0011
0012
0013 function [ImR] = malo06_decoder(exponente,directorio,fichero)
0014
0015 Lb = 16;
0016 Li = 256;
0017
0018 cd(directorio)
0019 unzip([fichero '.zip']);
0020 ristra = read_code_malo06([fichero '.bin']);
0021
0022 delete([fichero '.bin']);
0023
0024 TheCode = zeros(256,255);
0025
0026 normaliz = [3 ristra(1)];
0027 extr_err = ristra(2:3);
0028 QE = reshape(ristra(4:3+256),16,16);
0029 uCP = ristra(260);
0030
0031 ristra = ristra(261:end);
0032
0033 [TheCode] = inv_rle(ristra);
0034
0035 NumNiv = 2^uCP;
0036 MM = 0.8;
0037
0038 TheRealCode = TheCode * MM / NumNiv;
0039
0040 Nc = round(0.9 * 40);
0041 qe = (extr_err(2) - extr_err(1)) * QE / (Nc - 1) + extr_err(1);
0042
0043 Lmq = iimdpcm(qe,1,100);
0044
0045 aa = zeros(Lb);
0046 [h,kk1,kk2,gamm] = constrains_resp(exponente,1);
0047 [h_a,r,grad,alfa,beta] = respue5(aa,kk1,kk2,gamm,h,0);
0048
0049 fprintf('Recovering the image:\n');
0050 fprintf(' Inverting from r to dct\n');
0051
0052 z = 1;
0053
0054 dctc1 = zeros(Li,Li);
0055 Db = diag(beta);
0056
0057 for i=1:Lb:(Li-1)
0058 for j=1:Lb:(Li-1)
0059
0060 r = TheRealCode(z,:)';
0061
0062 signos = r < 0;
0063
0064 r = [0; abs(r)];
0065
0066 Dr = diag(r);
0067
0068 ac = ((inv(eye(size(h)) - Dr*h) * Db*r) .^ (1/gamm)) ./ alfa;
0069
0070 ac = ac(2:end);
0071 ac = ac .* (signos == 0) - ac .* (signos == 1);
0072 ac = [0; ac];
0073
0074 ac = dezigzag(ac);
0075
0076 dctc1(i:(i+(Lb-1)),j:(j+(Lb-1))) = ac;
0077
0078 z = z+1;
0079 end
0080 end
0081
0082 fprintf(' Inverting from dct to spatial domain\n');
0083
0084 dctc1i = icontra2(dctc1,Lmq,4,normaliz);
0085
0086 ImR = real(idct2r(dctc1i,4));
0087