One of the first few studies which introduced LBP in age estimation was from Gunay and Nabiyev 6. This has gained a great popularity which is one of the best performing texture descriptors and is also used in face detection, face recognition, gender classification, and texture classification, segmentation applications, to name a few.
It has been made into a powerful measure of image texture through its extensions showing an excellent results in terms of accuracy and computational complexity in many empirical studies. Extreme Learning Machine (ELM) is a fast and robust learning algorithm and is the simplest feedforward neural network. Due to its learning speed and accuracy of the algorithm, it is applied in various applications related to face analysis such as face recognition 15, 18, smile detection 1 and emotion recognition 17 were made into success.