how to write the code for dividing pixel values of an image with the mean pixel value?

Hello Sir, This is the code i have written.I have the global mean of the entire image(hyperspectral image).How can i write the code to divide each pixel of the image with the global mean value.

X=multibandread('subset.dat',[215,151,155],'int16',0,'bil','ieee-le,{'Band','Range',[1 5 151]});

S=decorrstretch(X);

spectrum=S(100,50,:);

band=size(spectrum);

band=band(3);

for n=0:(band-1)

x(n+1)=(n*5)+1;

y(n+1)=spectrum(1,1,n+1);

end

plot(x,y);

xlabel('band no.');

ylabel('reflectance');

mean_band=zeros(155,1);

for i=1:155

 mean_band(i,1)=mean(mean(i));

end

global_mean=mean(mean_band)

Answer 1

[Jan]

To scale each pixel vector in hyperspectral image X with the global data mean simply do

X = X ./ mean( X(:) );

[ALINA]

Thank you jan ,i will try