3D convolutional neural networks Empatica E4 Kinect sensor Learning Using Concave and Convex Kernels accuracy action recognition adaptive classifiers age classification attention allocation attention behavior biometric recognition blurring detection body movements boundary segmentation categorical data committee of classifiers concept drift context-aware framework convolutional neural network deep learning deep learning, emotion, face recognition, active learning, computer vision, databases discrete stationary wavelet transform emotion recognition ensemble methods face analysis face segmentation false negative rate fibromyalgia fingerprint image enhancement fingerprint quality