![Scientific and Technical Journal
of Information Technologies, Mechanics and Optics](/images/mag-ntv.png)
ANALYTICAL REVIEW OF METHODS FOR EMOTION RECOGNITION BY HUMAN FACE EXPRESSIONS
![Scientific and Technical Journal
of Information Technologies, Mechanics and Optics](/images/mag-ntv.png)
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Recognition of human emotions by facial expressions is an important research problem that covers many areas and disciplines, such as computer vision, artificial intelligence, medicine, psychology and security. This paper provides an analytical overview of video facial expression databases and approaches to recognition emotions by facial expressions, which include three main stages of image analysis, such as pre-processing, feature extraction and classification. The paper presents both traditional approaches to recognition of human emotions by visual facial features, and approaches based on deep learning using deep neural networks. We give the current results of some existing algorithms. In the review of scientific and technical literature we empathized mainly the sources containing theoretical and research information of the methods under consideration, as well as comparison of traditional methods and methods based on deep neural networks, which were supported by experimental studies. Analysis of scientific and technical literature describing methods and algorithms for study and recognition of facial expressions, as well as the results of world scientific research, have shown that traditional methods for classification of facial expressions are second in speed and accuracy to artificial neural networks. The main contribution of this review is providing a common understanding of modern approaches to recognition of facial expressions, which will enable new researchers to understand the main components and trends in the field of recognition of facial expressions. Moreover, comparison of world scientific findings has shown that a combination of traditional approaches and approaches based on deep neural networks achieves better classification accuracy, but artificial neural networks are the best classification methods. The paper may be useful to specialists and researchers in the field of computer vision.
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