| 摘要 |
PROBLEM TO BE SOLVED: To simplify image correction, and to enable photographing from a distance close to a plate surface.SOLUTION: A rail 5 extending in a lateral direction of a plate surface 1a is provided on an upper edge part of a frame body 4 of a white board 1. A slider 6 is provided on the rail freely movably. A first arm 11 extending upward is supported by the slider. A second arm extending toward a front side of the plate surface is supported by the first arm. A camera 3 is supported by an extending end part of the second arm. An imaging element and a lens, and a free-curved surface mirror for bending incoming light from the plate surface toward the imaging element via the lens are provided in the camera. A mechanism for changing a direction of the camera, which adjusts a relative angle between respective members of the slider, the first arm, the second arm, and the camera, is provided. Distortion in an image can be reduced by the free-curved surface mirror to enable photographing from a distance close to the plate surface, and even when deviation to the plate surface of a photographing region occurs, the deviation can be corrected by changing the direction of the camera. |
