Abstract
This paper proposes the method of acquiring 3-dimensional information by tracking four-laser points on the target, for the purpose of making a robot recognize a sign etc, more correctly. Here, 3-dimensional information means (1) the distance from the camera to the target, (2) the pan and the tilt angle, (3) the inclination of the target having tilt and pan. These valves are derived by measuring the change of squares' size, the position on 2-dimensional image plane, the length between right and left sides of the square as a target, respectively.
