Figure 1
From: Masking of Time-Frequency Patterns in Applications of Passive Underwater Target Detection
The Statistical (A, D) and Morphological (B, C, E) Data Processing Flow. A—Spectrograms 
are a subject to MMD test, the ouptut of which 
are used for estimation of entropy H and difference of entropies 
; B—The images of features (filled squares) are used to form 
. The feature vectors 
corresponding to SI are labeled by 
and by 
in the opposite case; C—mask of signal of interest in a form of GP tree; D—statistical processing of a test spectrogram 
; E—features estimated in D are used for testing the masking algorithm C.