In Alaa Kharbouch, Ali Shoeb, John Guttag, Sydney S. Cash, An algorithm for seizure onset detection using intracranial EEG, Epilepsy & Behavior, Volume 22, Supplement 1, 2011 (section 2.1, 3rd paragraph) about EEG, the authors note that the spectral amplitude profile of a signal is inversely proportional to frequency. To correct for this trend, they propose to apply a derivative filter to the signal.
My question is: Is there a Python function which implements such a derivative filter ? Is the savgol_filter function from the Scipy module suited to this task ? If not, how could I design such a filter in Python ?
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