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Figure 21 | BioMedical Engineering OnLine

Figure 21

From: From wavelets to adaptive approximations: time-frequency parametrization of EEG

Figure 21

Time-frequency energy density of a signal composed of two chirps presented in (a). In 3-dimensional plots on the left side energy is proportional to height, on flat pictures on the right – to the shades of gray. (b) presents results of a single decomposition over dictionary consisting of 500.000 atoms, and (c) – time-frequency representation averaged over 50 realizations of smaller dictionary (15.000 atoms)

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