96 lines
2.3 KiB
Matlab
96 lines
2.3 KiB
Matlab
clear;
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close all;
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% Paramètres à régler :
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nb_iterations = 1000;
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epsilon = 0.5;
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mu_prime = 5000;
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gamma = 3e-5;
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pas_affichage = 50;
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% Mise en place de la figure pour affichage :
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taille_ecran = get(0,'ScreenSize');
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L = taille_ecran(3);
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H = taille_ecran(4);
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figure('Name','Decomposition structure + texture par le modele TV-Hilbert','Position',[0,0,L,0.5*H]);
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tiledlayout(1,3, 'Padding', 'none', 'TileSpacing', 'compact');
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% Lecture et affichage de l'image u :
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u = imread('Images/Lena.jpg');
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u = double(u);
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[nb_lignes,nb_colonnes,nb_canaux] = size(u);
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% subplot(1,3,1);
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nexttile(1);
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imagesc(uint8(u));
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axis equal;
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axis off;
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title('Image');
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% Fréquences en x et en y (axes = repère matriciel) :
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[f_x,f_y] = meshgrid(1:nb_lignes,1:nb_colonnes);
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f_x = f_x/nb_lignes-0.5; % Fréquences dans l'intervalle [-0.5,0.5]
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f_y = f_y/nb_colonnes-0.5; % Idem
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eta = 0.05;
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Phi = eta./(f_x.^2+f_y.^2+eta);
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% Calcul des matrices Dx et Dy :
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nb_pixels = nb_lignes*nb_colonnes;
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e = ones(nb_pixels,1);
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Dx = spdiags([-e e],[0 nb_lignes],nb_pixels,nb_pixels);
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Dx(nb_pixels-nb_lignes+1:nb_pixels,:) = 0;
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Dy = spdiags([-e e],[0 1],nb_pixels,nb_pixels);
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Dy(nb_lignes:nb_lignes:nb_pixels,:) = 0;
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% Affichage de la structure initiale :
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u_barre = u;
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% subplot(1,3,2);
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nexttile(2);
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imagesc(uint8(u_barre));
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axis equal;
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axis off;
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title('Structure (000%)');
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% Affichage de la texture initiale :
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% subplot(1,3,3);
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nexttile(3);
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imagesc(uint8(u-u_barre));
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axis equal;
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axis off;
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title('Texture (000%)');
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drawnow;
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delete("saves/exo3lena.gif")
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export_fig(gcf, "saves/exo3lena.gif", '-png', '-painters', '-m2', '-append');
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for it = 1:nb_iterations
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for c = 1:nb_canaux
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% Mise à jour de la structure :
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u_barre(:,:,c) = real(calcul_structure_3(u_barre(:,:,c),u(:,:,c),Dx,Dy,Phi,epsilon,mu_prime,gamma));
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end
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% Affichage tous les pas_affichage itérations :
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if mod(it,pas_affichage)==0
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% Affichage de la structure :
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% subplot(1,3,2);
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nexttile(2);
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imagesc(uint8(u_barre));
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axis equal;
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axis off;
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title(['Structure (' num2str(100*it/nb_iterations,'%03.0f') '%)']);
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% Affichage de la texture :
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% subplot(1,3,3);
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nexttile(3);
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imagesc(uint8(u-u_barre));
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axis equal;
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axis off;
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title(['Texture (' num2str(100*it/nb_iterations,'%03.0f') '%)']);
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drawnow;
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export_fig(gcf, "saves/exo3lena.gif", '-png', '-painters', '-m2', '-append');
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end
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end
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