Recognition and Classification of human reactions with facial features

This paper compares different algorithms to identify the different emotions from facial expressions. This presents about recognition of 6 basic expressions like Sad, Happy, Disgust, Fear, Surprise, Anger, and Neutral. This paper does a review about various algorithms that effectively recognizes facial expressions with emotions. A survey of database and algorithms were explained along with a partly implementation using Principal Component Analysis (PCA). By this survey it is observed that say Support Vector Machine (SVM) and PCA are efficient than other algorithms. An implementation on Principal component analysis is carried out in this paper to identify the emotions using MATLAB.