Figure 1
From: A closed form unwrapping method for a spherical omnidirectional view sensor
Classification of omnidirectional view sensor. The common catadioptric omnidirectional sensor mirror profiles with practical SVP solution are the hyperboloidal and paraboloidal ones. The category “others” in the figure refers to profiles that are not of conic section. Spherical and conical are the common NSVP mirror profiles. Note that the SVP mirror profile is also a subset of NSVP. If the requirement of SVP constraint is not met, they fall back to NSVP category. Dioptric is another category of omnidirectional sensors beyond the discussion scope of this paper.