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Figure 6 | BioMedical Engineering OnLine

Figure 6

From: Spectral subtraction denoising preprocessing block to improve P300-based brain-computer interfacing

Figure 6

Illustration of the results of spectral subtraction denoising as compared to the original signal and wavelet shrinkage denoising. (Appear in Results and discussion). Illustration of the results of spectral subtraction denoising as compared to the original signal and wavelet shrinkage denoising. The left column shows from the top down: original signal, denoised signal using spectral subtraction, and denoised signal using wavelet denoising. On the right, the difference between the denoised signals and the original are shown to illustrate their random nature and show the relative amount removed between the spectral subtraction and wavelet methods. The amount removed by spectral subtraction seems to be higher than wavelet denoising for the same signal.

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