how to use GLCM to a special object that has been marked by bwlabel and Bounding Box?

please help me , how to use GLCM to a special object that has been marked by bwlabel and Bounding Box . I've tried with looping to find the area , perimeter , it managed to calculate each object , but the result is the same for GLCM value of each object. should be different for each object . Thank you very much

for k = 1 : length(st) thisBB = st(k).BoundingBox; rectangle('Position', [thisBB(1),thisBB(2),thisBB(3),thisBB(4)],... 'EdgeColor','r','LineWidth',2 )

    GLCM = graycomatrix(BW,'Offset',[0 1; -1 1; -1 0; -1 -1]);
    stats = graycoprops(GLCM,{'contrast','correlation','energy','homogeneity'});

     Contrast= stats.Contrast;
     Correlation = stats.Correlation;
     Energy = stats.Energy;
     Homogeneity = stats.Homogeneity;

    data1{1,k} = Contrast(1);
    data1{2,k} = Contrast(2);
    data1{3,k} = Contrast(3);
    data1{4,k} = Contrast(4);

    data2{1,k} = Correlation(1);
    data2{2,k} = Correlation(2);
    data2{3,k} = Correlation(3);
    data2{4,k} = Correlation(4);

    data3{1,k} = Energy(1);
    data3{2,k} = Energy(2);
    data3{3,k} = Energy(3);
    data3{4,k} = Energy(4);

    data4{1,k} = Homogeneity(1);
    data4{2,k} = Homogeneity(2);
    data4{3,k} = Homogeneity(3);
    data4{4,k} = Homogeneity(4);

    data5{1,k} = mean(Contrast);
    data5{2,k} = mean(Correlation);
    data5{3,k} = mean(Energy);
    data5{4,k} = mean(Homogeneity);

    disp('===================================')     
    disp(strcat(['Object number = ', num2str(k)]))
    disp(strcat(['Contrasrt   = ',num2str(Contrast)]))
    disp(strcat(['Correlation = ',num2str(Correlation)]))
    disp(strcat(['Energy      = ',num2str(Energy)]))
    disp(strcat(['Homogeneity = ',num2str(Homogeneity)]))

end

=============================================================================================== result

=================================== Object number = 1 Contrasrt = 0.041167 0.059874 0.044501 0.058789 Correlation = 0.94909 0.92602 0.94497 0.92736 Energy = 0.98266 0.98226 0.98259 0.98228 Homogeneity = 0.99926 0.99893 0.99921 0.99895 =================================== Object number = 2 Contrasrt = 0.041167 0.059874 0.044501 0.058789 Correlation = 0.94909 0.92602 0.94497 0.92736 Energy = 0.98266 0.98226 0.98259 0.98228 Homogeneity = 0.99926 0.99893 0.99921 0.99895 =================================== Object number = 3 Contrasrt = 0.041167 0.059874 0.044501 0.058789 Correlation = 0.94909 0.92602 0.94497 0.92736 Energy = 0.98266 0.98226 0.98259 0.98228 Homogeneity = 0.99926 0.99893 0.99921 0.99895 . . . =================================== Object number = 26 Contrasrt = 0.041167 0.059874 0.044501 0.058789 Correlation = 0.94909 0.92602 0.94497 0.92736 Energy = 0.98266 0.98226 0.98259 0.98228 Homogeneity = 0.99926 0.99893 0.99921 0.99895