Figure 1
From: Classification and automatic scoring of arousal intensity during sleep stages using machine learning

A workflow of the automated arousal intensity scoring and classification process. First, the collected arousal events are divided into training and test sets. The arousal intensity of the training data set is scored. Both datasets undergo a feature engineering process. Finally, the arousal intensity is classified using machine learning algorithms with sleep stage optimization. All icons from Freepik (freepik.com).