Three main incorporations of physical robots are forecasted in our lives: transport, assistance and factory robots. Design and requisites of these different kinds are quite different, but one particularly is attracting researchers’ efforts: navigation. While transport robotics is located outdoors, the rest two are indoors. Outdoors machines can make use of a GPS (among other instruments) to navigate, but indoor robotics cannot and require extra aids to position and orientate. Among these, visual odometry system is the most used one for wheeled robots.
However, visual odometry implies assuming navigation errors and knowing the exact position of the robot turns to be a very hard task. There are two kinds of errors:
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