Advanced Technologies of Indoor Navigation for Visually Challenged Persons

Indoor navigation in unfamiliar surroundings has been a tough task for visually challenged persons. Electronic travelling aids (ETA) embedded with different features such as obstacle detection and recognition towards the desired destination whether it is staircase, lifts or some room can help the visually challenged person for navigation. GPS technology has limitation in indoor navigation due to very low accuracy. This paper presents a comprehensive review on recent advances in indoor navigation technologies and aids for facilitating the visually challenged person movement. Based on the studied researches this paper gives some recommendation for the future scope of work in this direction has been enumerated.