Authors : Justus Schwan, Esam Ghaleb, Enrique Hortal and Stylianos Asteriadis
Title : High-performance and Lightweight Real-time Deep Face Emotion Recognition
Conference : SMAP2017 – 12th International Workshop on Semantic and Social Media Adaptation and Personalization (Special Session on Multimodal affective analysis for human-machine interfaces and learning environments)
Deep learning is used for all kinds of tasks which require human-like performance, such as voice and image recognition in smartphones, smart home technology and self-driving cars. While great advances have been made in the field, results are often not satisfactory when compared to human performance. In the field of facial emotion recognition, especially in the wild, Convolutional Neural Networks (CNN) are employed because of their excellent generalization properties. However, while CNNs can learn a representation for certain object classes, an amount of (annotated) training data roughly proportional to the class’s complexity is needed and seldom available. This work describes an advanced pre-processing algorithm for facial images and a transfer learning mechanism, two potential candidates for relaxing this requirement. Using these algorithms, a lightweight face emotion recognition application for Human-Computer Interaction with TurtleBot units was developed.