“…laser light or radio waves) and measuring the return. There is a significant literature on vision-based navigation [14,84,58,60,73,66,28,25,64,43], and our experimental section could be characterized simply as occlusion-driven navigation [47,48,9]. In most of the literature, stereo or motion are exploited to provide a three-dimensional map of the environment, which is then handed off to a path planner, separating the photometric from the geometric and topological aspect of the problem.…”