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. 2022 Aug 15;22(16):6093. doi: 10.3390/s22166093

Figure 9.

Figure 9

The 13-channel raw EEG signal data preparation for volume representation. Before arranging the signal into a 3D matrix, eight zero-padding arrays are introduced into the sample to be able to generate a 3 × 3 × 3 matrix, where C indicates the number of channels, Ns indicates the number of samples per channel, and D indicates the number of depth layers in the 3D matrix of the volume representation.