Circular window for Bernsen local contrast thresholding using MATLAB

I am trying to use bernsen local contrast threshoding for my medical images. As mentioned in the document ImageJ uses circular window. May know how to create and use it in matlab? what is the size of the window ? I have downloaded MATLAB code for bernsen but it takes only 3x3 window.

Don’t you think you should be asking that in a Matlab forum?

Can you tell me how to implement bernsen with circular window?

In Matlab? No I cannot.

OK last question. How does ImageJ calculates contrast using GLCM ?