Documentation

3.4. Signal Transformations

Updated 31 August 20261 min read

All transformations are applied in the order described in Section 1. For each graph (1 and 2), an independent transformation chain can be specified, which allows different processing methods to be compared.

Example use case:

  • Graph 1: Filtered + CAR + Denoise (blink artifacts) + Alpha filter (8–13 Hz) + Power + Epoch length 4 s
  • Graph 2: Filtered + CAR + Denoise (blink artifacts) + Beta filter (13–30 Hz) + Power + Epoch length 4 s

This makes it possible to visually compare alpha and beta activity on one screen.

Time domain view overlaying two signal-processing pipelines per electrode (F8, AF4, AF3): a red trace for filtered alpha-band (8-13 Hz) power and a green trace for filtered beta-band (13-30 Hz) power, with color-coded vertical episode markers across the recording timeline.