A Review of Intelligent Techniques For Facial Expression Recognition
Pratibha Sharma, Swati Nigam, Rajiv Kumar Singh, Siddharth Singh · 2024
The most reliable indicator of an individual’s emotional state is facial expression. According to the literature, numerous facial expression recognition techniques have been developed in the past. These techniques allow for the recognition of fundamental, micro, and three-dimensional (3D) expressions. Although several reviews of these techniques have also been presented, none of them provide a comprehensive analysis of facial expression recognition techniques based on fundamental, micro, and 3D expressions. They concentrate solely on one of these areas. Therefore, we provide a brief overview of fundamental, micro, and 3D facial expression recognition techniques in this article. The other advantages of this review are that we provide a brief illustration of the datasets that exist for each of these. These datasets have been provided under separate headings so that the reader gets a clear idea of techniques as well as datasets that belong to these three specific fields. Machine learning (ML) as well as deep learning has both been taken into consideration for this review. Moreover, only recent techniques have been considered for this review.