Average mutual information 2 Biomedical signal processing 2 Brain–computer interface 2 Electroencephalogram 2 Electroencephalogram signals 2 Electroencephalography 2 Electromyo grams 2 Electromyogram 2 Heuristic algorithms 2 Image denoising 2 Modified non-local mean filter 2 Muscle 2 Muscle artifact 2 Non-local mean filters Optimization 2 Wavelet Packet Decomposition 2 Wavelet decomposition 2 brain–computer interface (BCI) 2 electroencephalogram (EEG) 2 electromyogram (EMG) 2 modified non-local means filter (NLM) 2 muscle artifacts 2