Exactly so... keith whaley
Rob Studdert wrote: > > On 10 Mar 2003 at 7:23, Mishka wrote: > > > fisheye with no distortion is no more oxymoron than rectilinear with no > > distortion. > > it is not possible to map 3d world as we see it (hemisphere) on a plane with no > > distortion. from this point of view, rectilinear is as bad as fisheye, just > > different. when speaking of lenses, "no distortion" usually means "no deviation > > from the idealized mapping", for rectilinear being x=t*tan(theta), and for > > fisheye x=r*theta or x=r*sin(theta). > > View a photo rendered using a rectilinear lens from the appropriate distance > with one eye and it's as true in geometry as the real world, fisheye renderings > are not at any distance using one eye or two. > > � Rob Studdert
