NavCog: turn-by-turn smartphone navigation assistant for people with visual impairments or blindness.

NavCog is a novel smartphone navigation system for people with visual impairments or blindness, capable of assisting the users during autonomous mobility in complex and unfamiliar indoor/outdoor environments. The accurate localization achieved by NavCog is used for precise turn-by-turn way-finding assistance as the first step, but the ultimate goal is to present a variety of location based information to the user, such as points of interest gathered from social media and online geografic information services.