Security authentication Age group classification 1 Age groups 1 Age-group classifications 1 Biometric recognition 1 Classification (of information) 1 Complex task 1 Convolution 1 Convolutional neural network 1 Deep learning 1 Deep neural networks 1 Face recognition 1 Facial images 1 Health security 1 Image classification 1 Intelligent robots 1 Still image face recognition 1 Still-images 1 Student card 1 Viola-Jones algorithm 1