5. Conclusion

With the rapid increase of computing power and size of data, it has become more and more feasible to distinguish emotions, identify people, and verify honesty based on video, audio or image input, taking a large step forward not only in human-computer interaction, but also in mental illness detection, medical research, security and so forth. In this paper an overview of existing face databases in varying categories has been given. They have been organised into tables to give the reader an easy way to find necessary data. This paper should be a good starting point for anyone who considers training a model for emotion recognition.
