ORIGINAL ARTICLE Face detection and recognition of natural human emotion using Markov random fields

Abstract This paper presents an integrated system for emotion detection. In this research effort, we have taken into account the fact that emotions are most widely rep-resented with eye and mouth expressions. The proposed system uses color images and it is consisted of three modules. The first module implements skin detection, using Markov random fields models for image segmenta-tion and skin detection. A set of several colored images with human faces have been considered as the training set. A second module is responsible for eye and mouth detec-tion and extraction. The specific module uses the HLV color space of the specified eye and mouth region. The third module detects the emotions pictured in the eyes and mouth, using edge detection and measuring the gradient of eyes ’ and mouth’s region figure. The paper provides results from the system application, along with proposals for further research