Seyyed Mohammad Hossein Dadgar - Master Student of Artifical Intelligence Department of Computer Engineering Islamic Azad University, Central Branch Tehran, Iran
Fardad Farokhi - Assistant Professor of Biomedical Engineering Department Department of Biomedical Engineering Islamic Azad University, Central Branch Tehran, Iran

Face recognition, is an important research issue in image processing which aims to recognize facial images that are similar to a query image. One of the open challenges in face recognition that greatly affects the performance of such system is aging. While majority of works focus on estimating the age and age simulation, very limited number of studies have worked on age invariant face recognition. Age invariant face recognition has earned a lot of attention due to its potential in actual applications. The appearance of a person's face varies significantly over time, Design of an appropriate structure to present a consistent and efficient framework for facial changes over the lifetime of an individual, still remains as a key challenge. In this study, approaches proposed to age invariant face recognition are investigated and reviewed and some suggestions for future work are given.

image processing, face recognition, age invariant