| 摘要 |
<p>PURPOSE: To eliminate the need of adjustment at the time of installation, to make the selection of an installation place unnecessary and to prevent the shadow of an operator from being projected so much by using the position information of a projection part and deforming pictures projected by the projection part. CONSTITUTION: A picture processing part 4 stores the track of a marker 2 on a picture memory 5 as plotting information. A supporting part 7 is arranged on a tablet 1 and supports the projection part 6 in a state movable in a horizontal direction. A position detection part 8 detects the supporting position of the projection part 6 in the supporting part 7. A picture deformation part 9 decides a picture deformation ratio by position information signals inputted from the position detection part 8, deforms picture information signals read from the picture memory 5 and stores the deformed track of the marker 2 in a deformed picture memory 10. The projection part 6 projects picture data stored in the deformed picture memory 10 on the tablet 1. Thus, no matter which position the projection part 6 is present at, the track of the marker 2 is accurately displayed on the tablet 1.</p> |
