S. Manthira Moorthi, D. Dhar, R. Sivakumar, Co-registration of LISS-4 multispectral band data using mutual information-based stochastic gradient descent optimization, Current Science, Vol. 113, No. 5 ...

In the '80s, navigating that gradient was derided by MIT scientist Marvin Minsky as mere "hill climbing." (The inverse of gradient descent is like ascending to a summit of highest accuracy.) ...