From time to time someone gets lost and askhimself "How do I get there?" With the advent of the GPSthis question can be answered. However due to difficultiessuch as lack of precision, possibility of inaccurate maps,network dependency, and cost lead the pursuit of analternative solution. In order to locate himself the person canuse a different method: using a smartphone camera hisposition is recognized visually, based in environmentreferences, and then an arrow pointing the right directionappears in a map in the display. This method wasimplemented in the application framework of Android,using OpenCV and its implementation of the SURFalgorithm. The final application is named TrueSight and westudy its viability and limitations. The authors conclude thata vision-based navigation system is viable, but databaseimprovements and exhibition could make it better.
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