“…They carry out the task by extracting certain properties (e.g., local features or holistic intensity patterns) of a set of training images acquired at a fixed pose (e.g., upright frontal pose). Additional algorithms have been proposed to learn these generic templates (e.g., eigenface and statistical distribution) or discriminant classifiers (e.g., neural networks, Fisher linear discriminant, sparse network of Winnows, decision trees, Bayes classifiers, support vector machines, and AdaBoost) [9,7,5,8,11].…”