Figure 3From: Extraction of single-trial cortical beta oscillatory activities in EEG signals using empirical mode decomposition Examples of IMF selection and signal reconstruction procedure. IMF waveforms, Fourier spectra and spatial maps of IMF waveforms obtained from one single-trial epoch using EMD. Only IMF 3 and IMF 4, having high correlation with the spatial template, are selected for signal reconstruction.Back to article page