Independent Component Analysis: A Low-Complexity Technique

Martı́n-Clemente, Rubén; Hornillo-Mellado, Susana; Camargo-Olivares, José Luis

doi:10.1007/978-3-642-21326-7_35

Cited by 2 publications

(1 citation statement)

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“…Concerning source separation, independent component analysis (ICA) [ 11 – 13 ], which yields maximally temporally independent signals from the EEG recording, is a powerful tool for separating brain activity from artifacts. However, the iterative process for measuring independence from EEG signals within multichannel recordings is computationally intractable [ 14 ]. Additionally, manually excluding the ICA components that are associated with artifacts is challenging and time-consuming.…”

Section: Introductionmentioning

confidence: 99%

Real-Time EEG Signal Enhancement Using Canonical Correlation Analysis and Gaussian Mixture Clustering

Lin

Huang

Wenyu

et al. 2018

Journal of Healthcare Engineering

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Electroencephalogram (EEG) signals are usually contaminated with various artifacts, such as signal associated with muscle activity, eye movement, and body motion, which have a noncerebral origin. The amplitude of such artifacts is larger than that of the electrical activity of the brain, so they mask the cortical signals of interest, resulting in biased analysis and interpretation. Several blind source separation methods have been developed to remove artifacts from the EEG recordings. However, the iterative process for measuring separation within multichannel recordings is computationally intractable. Moreover, manually excluding the artifact components requires a time-consuming offline process. This work proposes a real-time artifact removal algorithm that is based on canonical correlation analysis (CCA), feature extraction, and the Gaussian mixture model (GMM) to improve the quality of EEG signals. The CCA was used to decompose EEG signals into components followed by feature extraction to extract representative features and GMM to cluster these features into groups to recognize and remove artifacts. The feasibility of the proposed algorithm was demonstrated by effectively removing artifacts caused by blinks, head/body movement, and chewing from EEG recordings while preserving the temporal and spectral characteristics of the signals that are important to cognitive research.

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Section: Introductionmentioning

confidence: 99%