| 摘要 |
<p>PURPOSE:To obtain a system in which a pointing position detecting means is not hindered by a silhouette, etc., by detecting a laser light of a pointing device, which transmits through the display surface of a projection type large display device, and deciding an indicated position. CONSTITUTION:From a pointing device 11, an infrared layer light 12 is outputted. The display surface 21 of a projection type large display device is constituted of a material for allowing the laser light to transmit through it easily. A projector 22 of the projection type large display device is installed in the rear of the display surface 21. An infrared camera 3 is installed in a position where the camera is not hindered for displaying an image by the projector 22 being in the rear of the display surface 21. An image processor 4 decides what position of the display surface 21 the infrared laser light 12 transmits through (a pointing position by the pointing device 11), based on an image in the rear of the display surface 21 photographed by the infrared camera 3. A computer 5 displays an indicating cursor 6 in the pointing position decided by the image processor 4.</p> |
