59 lines
1.6 KiB
Mathematica
59 lines
1.6 KiB
Mathematica
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% Aymeric Arnould, Tom Colinot
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% TP3
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% Compensation de mouvement (2/2)
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% PSNR moyen et débit moyen
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%clear all
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n=5; %Nombre d'images à coder
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gamma=1:10;
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blksize = 16; %taille des blocs
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SearchRange = 8; %portée des vecteurs mouvements
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PSNRmoy=[];
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bpsmoy=[];
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bpsmoy2=[];
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for i=1:length(gamma)
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g=gamma(i);
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file = fopen('Foreman.qcif','r');
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PSNR_seq=[];
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bpp_seq=[];
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bppMV_seq=[];
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[compY,~,~]=yuv_readimage(file,'qcif');
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Yc= zeros(size(compY,1),size(compY,2),n); %images (dé)codées
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%Codage de la première image
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[I_rec,PSNR,bpp] = encodeINTRA(compY,g);
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Yc(:,:,1) = I_rec;
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PSNR_seq(1) = PSNR;
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bpp_seq(1) = bpp;
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for k = 2:n
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[compY,~,~]=yuv_readimage(file,'qcif');
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compYr = Yc(:,:,k-1);
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[compPred,~,~,bppMV] = PicturePred(compY,compYr,blksize,SearchRange);
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[I_rec,~,bpp] = encodeINTRA(compY-compPred,g);
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Yc(:,:,k) = compPred + I_rec;
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PSNR_seq(k) = PSNR;
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bpp_seq(k) = bpp;
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bppMV_seq(k-1) = bppMV;
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end
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PSNRmoy(i) = mean(PSNR_seq);
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bpsmoy(i) = mean(bpp_seq)*size(compY,1)*size(compY,2)*15; %en ne tenant pas compte de bppMV
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bpsmoy2(i) = (mean(bppMV_seq)+mean(bpp_seq))*size(compY,1)*size(compY,2)*15; %en tenant compte de bppMV
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fclose('all');
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end
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figure(2);
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subplot(131); plot(gamma,PSNRmoy); xlabel('gamma'); ylabel('PSNR moyen');
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subplot(132); plot(gamma,bpsmoy,gamma,bpsmoy2); xlabel('gamma'); ylabel('Debit moyen (bps)'); legend('Sans bppMV','Avec bppMV');
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subplot(133); plot(bpsmoy,PSNRmoy,bpsmoy2,PSNRmoy); xlabel('Debit moyen (bps)'); ylabel('PSNR moyen'); legend('Sans bppMV','Avec bppMV');
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