function AD = attache_donnees_RVB(I,moyennes,variances)
    [nx,ny,nc] = size(I);
    N = length(moyennes);
    AD = zeros(nx,ny,N);
    for i = 1:nx
        for j = 1:ny
            for k = 1:N
                sigma(:,:) = variances(k,:,:);
                x(:) = I(i,j,:);
                mu(:) = moyennes(k,:);
                AD(i,j,k) = 1/((2*pi)^(nc/2)*sqrt(det(sigma))) ...
                          * exp(-1/2*(x-mu)*(sigma\(x-mu)')); 
            end
        end
    end
end