Feature Extraction Techniques on Facial Images: An Overview

This paper provide a general overview on different kinds of feature extraction techniques. These techniques are categorized into four major classes, the first one is feature-based approaches, the second is appearance based approach, and then template-based, and finally part-based approaches. Some techniques are illustrated in details while the others with general explanation. In this research we found that various techniques of feature extraction provide an excellent results for various image processing and pattern recognition applications.