| 摘要 |
PROBLEM TO BE SOLVED: To improve accuracy of detecting a distance between a tip of a pointing element and a screen.SOLUTION: An interactive projector includes: a projection unit; a plurality of cameras; and a position detection unit for detecting a three-dimensional position of a pointing element with respect to a projected screen on the basis of a plurality of images including the pointing element captured by the plurality of cameras. When a unit vector representing a normal direction of the projected screen, a unit vector representing a direction of the optical axis of the first camera, and a unit vector representing a direction of the optical axis of the second camera are defined as a projected screen normal vector, a first optical axis vector and a second optical axis vector, respectively, the first camera and the second camera are disposed in such a manner that an absolute inner product of the first optical axis vector and the projected screen normal vector is smaller than an absolute inner product of the second optical axis vector and the projected screen normal vector.SELECTED DRAWING: Figure 5 |
