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pretraitement.m
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pretraitement.m
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function [Ip, LabIp] = pretraitement(I,R)
% Image originale
Ir = imread(I);
figure
subplot(231)
imagesc(Ir)
axis off
title('image originale');
Irbw = rgb2gray(Ir);
subplot(232)
imshow(Irbw,[])
title('image en niveaux de gris');
% Image binaire
seuil = mean(mean(imadjust(Irbw)));
Irbin = imadjust(Irbw);
Irbin(imadjust(Irbw) > seuil) = 0;
Irbin(imadjust(Irbw) < seuil) = 1;
subplot(233)
imshow(Irbin, []);
title('seuillage');
% Image débruitée
strel1 = strel('disk', R(1), 0);
IrO = imopen(Irbin, strel1);
M = zeros(size(Irbw));
for i = 1:size(Irbw,1)-1:size(Irbw,1)
for j = 1:size(Irbw,2)-1:size(Irbw,2)
M(i,:) = Irbw(i,:);
M(:,j) = Irbw(:,j);
end
end
Irec = imreconstruct(uint8(M), IrO);
Ires = IrO - Irec;
subplot(234)
imshow(Ires, [])
title('extraction du fond');
% Boucher les trous
strel2 = strel('disk', R(2), 0);
IrO2 = imopen(1-imreconstruct(Irec, 1-Ires),strel2);
subplot(235)
imshow(IrO2, [])
title('ouverture');
% Composantes connexes
Ip = bwlabel(IrO2,4);
subplot(236)
imagesc(label2rgb(Ip,'prism','k'))
axis off
title('Composantes connexes');
% Labels
LabIp = unique(Ip);
LabIp(1) = [];
end