epifanio03_decoder_v2

PURPOSE ^

SYNOPSIS ^

function [ImR] = epifanio03_decoder_v2(directorio,fichero,signos_dct)

DESCRIPTION ^

CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

SOURCE CODE ^

0001 
0002 function [ImR] = epifanio03_decoder_v2(directorio,fichero,signos_dct)
0003 M = 10;
0004 trayfich = 'estarereB';
0005 
0006 load(trayfich);
0007 invgrad=inv(grad);
0008 Lb = 16;
0009 Li = 256;
0010 
0011 cd(directorio)
0012 unzip([fichero '.zip']);
0013 ristra = read_code_epifanio03([fichero '.bin']);
0014 
0015 delete([fichero '.bin']);
0016 TheCode = zeros(256,255);
0017 
0018 extr_err = ristra(1:2);
0019 size(extr_err)
0020 QE = reshape(ristra(3:2+256),16,16);
0021 size(QE)
0022 uCP = ristra(259)
0023 
0024 ristra = ristra(260:end);
0025 
0026 [TheCode] = inv_rle(ristra);
0027 
0028 TheCode = [zeros(Li,1) TheCode];
0029 
0030 TheRealCode = TheCode .* M/(2^uCP);
0031 
0032 signos = sign(TheRealCode);
0033 signos(signos == 0) = 1;
0034 mis_signos = signos;
0035 
0036 Nc = round(0.9 * 40);
0037 qe = (extr_err(2) - extr_err(1)) * QE / (Nc - 1) + extr_err(1);
0038 
0039 Lmq = iimdpcm(qe,1,100);
0040 
0041 fprintf('Recovering the image:\n');
0042 fprintf('  Inverting from r to dct\n');
0043 z = 1;
0044 dctc = zeros(Li,Li);
0045 for i = 1:Lb:Li
0046     for j = 1:Lb:Li-1
0047 
0048         bloque = TheRealCode(z,:)';
0049 
0050         signo_b = signos(z,:)';
0051 
0052         inversion = signos_dct(z,:)' .* adctm + signos_dct(z,:)' .* (invgrad * V2 * bloque);
0053         bloque_inv = dezigzag(inversion);
0054 
0055         dctc(i:i+Lb-1,j:j+Lb-1) = bloque_inv;
0056         z = z+1;
0057     end
0058 end
0059 fprintf('  Inverting from dct to spatial domain\n');
0060 
0061 dcti = icontrast_2(dctc,Lmq,4,[1 0]);
0062 
0063 ImR = real(idct2r(dcti,4));

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