Automatic recognition of micro-expressions using local binary patterns on three orthogonal planes and extreme learning machine

Abstract

The use of micro expressions as a means to understand ones state of mind has received major interest owing to the rapid increase in security threats. The subtle changes that occur on ones face reveals one's hidden intentions. Recognition of these subtle intentions by humans can be challenging as this needs well trained people and is always a time consuming task. Automatic recognition of micro expressions thus promises an avenue to save time and resources. In this paper we propose a framework for detecting the presence of micro-expressions using local binary patterns on three orthogonal planes (LBP-TOP) because of its ability to extract temporal features and extreme learning machine (ELM) because of its fast learning speed. To evaluate the performance of the algorithm, CASME II micro-expression database was used for the experiment. We obtained an accuracy of 96.12% which is a significant improvement when compared with the state-of-the-art methods.