Image Denoising by Data Adaptive and Non-Data Adaptive Transform Domain Denoising Method Using EEG Signal - Proceedings of All India Seminar on Biomedical Engineering 2012 (AISOBE-2012) - page 18

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Fig. 4 EEG signal mixed with noise

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Fig. 5 EEG signal after applying independent component analysis

Here, from Fig. 6 we can conclude that artifacts and noise is removed from the
original EEG signal to a great extent because of use of both methods ICA and
wavelet denoising, which use Otsu's method for thresholding.