The details about how to calculate the entropy maps?

[songkq]

As mentioned in the paper, "Shannon entropy was applied to calculate the entropy maps, which is defined as E(x) = G(x).dot(log[G(x)])".
I wonder if the above equation used for calculating the entropy maps is implemented just like the entropyfilt function in MATLAB
https://ww2.mathworks.cn/help/images/ref/entropyfilt.html#mw_2347bab0-aec8-47a0-9664-d045c09822b1?
Does it calculate the local entropy of the segmentation result in this way?