تشخیص احساسات مبتنی بر سیگنال‌های EEG به کمک یادگیری عمیق مبتنی بر حافظه کوتاه‌مدت ماندگار دوجهته و مکانیسم توجه
محورهای موضوعی : مهندسی برق و کامپیوتر
سیدعابد حسینی
1
(گروه مهندسی برق، دانشگاه آزاد اسلامی واحد مشهد، ایران)
محبوبه هوشمند
2
(گروه مهندسی کامپیوتر، دانشگاه آزاد اسلامی واحد مشهد، ایران)
کلید واژه: تشخیص احساس, حافظه کوتاه‌مدت ماندگار دوجهته, سیگنال مغزی, مکانیسم توجه, یادگیری عمیق,
چکیده مقاله :
این پژوهش به تشخیص احساسات از روی سیگنال‌های EEG به کمک یادگیری عمیق مبتنی بر حافظه کوتاه‌مدت ماندگار (LSTM) دوجهته و مکانیسم توجه می‌پردازد. در این پژوهش از دو پایگاه داده SEED و DEAP برای تشخیص احساس استفاده شده است. داده SEED شامل سیگنال‌های EEG در 62 کانال متعلق به 15 شرکت‌کننده در سه دسته مختلف از احساسات مثبت، خنثی و منفی است. داده DEAP شامل سیگنال EEG در 32 کانال متعلق به 32 شرکت‌کننده در دو دسته از ظرفیت و برانگیختگی است. LSTM کارایی خود را در استخراج اطلاعات زمانی از سیگنال‌های فیزیولوژیکی طولانی نشان داده است. نوآوریهای این پژوهش شامل استفاده از یک تابع تلفات جدید و بهینه‌ساز بیزین برای یافتن نرخ یادگیری اولیه است. صحت روش پیشنهادی برای طبقه‌بندی احساسات در پایگاه داده SEED 72/96 درصد شده است. صحت روش پیشنهادی برای طبقه‌بندی احساس در دو دسته ظرفیت و برانگیختگی در پایگاه داده DEAP به‌ترتیب 9/94 و 1/97 درصد است. نهایتاً مقایسه نتایج به‌دست‌آمده با پژوهش‌های اخیر روی داده‌های یکسان، نشان از بهبود نسبتاً خوب روش پیشنهادی دارد.
This research deals with the recognition of emotions from EEG signals using deep learning based on bi-directional long short-term memory (LSTM) and attention mechanism. In this study, two SEED and DEAP databases are utilized for the emotion recognition. The SEED database includes EEG signals in 62 channels from 15 participants in three categories of positive, neutral, and negative emotions. The DEAP dataset includes EEG signals in 32 channels from 32 participants in two categories of valence and arousal. LSTM has shown its efficiency in extracting temporal information from long physiological signals. The innovations of this research include the use of a new loss function and Bayesian optimizer to find the initial learning rate. The accuracy of the proposed method for the classification of emotions in the SEED database is 96.72%. The accuracy of the proposed method for classifying emotions into two categories of valence and arousal is 94.9% and 97.1%, respectively. Finally, comparing the obtained results with recent research studies.
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