NeuroSense: An AI System for Emotion Recognition Based on EEG Signals

NeuroSense is an innovative project that uses artificial intelligence to analyze electroencephalogram (EEG) signals for automatic emotion recognition, exploring the intersection of brain-computer interfaces and affective computing. Compared to traditional emotion recognition methods relying on external indicators like facial expressions and voice, EEG directly reflects brain neural activity and has advantages of objectivity, real-time performance, and resistance to伪装 (being hard to fake). Though still in the development stage, the project has great potential in fields such as mental health monitoring and human-computer interaction optimization, while ethical and privacy challenges need attention.

Traditional emotion recognition relies on external indicators like facial expressions and voice, which are susceptible to subjective control and environmental interference. EEG records cerebral cortex electrical activity via scalp electrodes, providing a neurophysiological basis for emotions. Its key features include millisecond-level time resolution, portability, low cost, and non-invasiveness, though signals are complex. Different brain wave bands (Delta, Theta, Alpha, Beta, Gamma) correlate with emotional states—for example, positive emotions are often associated with enhanced Alpha waves in the left prefrontal lobe.

The technical architecture includes data collection and preprocessing (10-20 system electrode placement, sampling and filtering, ICA for artifact removal), feature extraction (time-domain statistics, frequency-domain power spectrum, time-frequency characteristics, spatial connectivity, nonlinear features), and machine learning models (traditional ML like SVM, deep learning like CNN/RNN, graph neural networks). Emotion classification uses discrete models (e.g., six basic emotions) and dimensional models (valence, arousal, dominance).

Application scenarios cover mental health monitoring (depression screening, anxiety assessment), human-computer interaction optimization (adaptive interfaces, game immersion, intelligent education), driving safety (fatigue detection, stress monitoring), and auxiliary communication (autism assistance, emotional expression for locked-in syndrome patients).

It faces challenges such as signal quality problems (noise interference, individual differences, state fluctuations), labeling difficulties (strong subjectivity, high data acquisition costs), and ethical privacy issues (risks of thought transparency, need for informed consent).

Future development will focus on wearable devices, real-time processing, multi-modal fusion (combining facial/voice signals), personalized models, and causal inference (understanding neural mechanisms of emotions).

NeuroSense represents the cutting-edge intersection of brain-computer interfaces and affective computing, decoding emotions through the combination of AI and neuroscience. Its potential application value is huge, but ethical risks need vigilance. Technological development should proceed alongside ethical considerations like privacy protection and informed consent to truly benefit humanity.