# MATLAB: Matlab image, get mean values of selected coordinates

image analysisimage processing

Hello,
I would like to analyse mean values of an image. However, I do not want to see mean values of whole image but just the selected parts.
My images are like the ones below, they are saliency maps. So, ca you please help me to find a code to analyse the mean values of for instance, y= 177:400 x= 37:393?
I am quite new at Matlab, so I would really appreciate if you can let me know all the steps that I should follow.
Thanks

y= 177:400;x= 37:393 ; T = Z(x,y) ;    % this gives you required chunkiwant = mean(T(:))