Abstract
In this paper, we propose four new plane estimation methods using only single uncalibrated image. It is well known that only one image cannot provide enough 3D information, but some metrical quantities can be estimated directly from the single image by using geometrical clues such as planarity of points and parallelism of lines and planes. Specifically in this paper, we utilize four new geometrical clues to estimate a specified space plane; the first is known length on the plane, the second is known angle on the plane, the third is true circle and its center position on the plane, and the last is two circles on the plane or its parallel ones. Furthermore, we estimate several 3D entities such as a distance between two space points from the single image by using estimated planes. Experiments using some real images verified that our methods give good 3D information.
