| 摘要 |
Zoom adjustment is to be automatically performed so that a projection image conforms with a projection area on a projection body (screen, for example). The positions of the four corners of the projection area and the positions of the four corners of the projection image are detected on an image captured by a camera unit, and the positions of the four corners of the projection area with respect to the positions of the four corners of the projection image is transformed to the positions on a panel coordinate system set in a spatial optical modulating device (panel). A first minimum target frame TF1 including the four corners of the projection area transformed on the panel coordinate system is set on the panel coordinate system and a second target frame TF2 in consideration of an aspect ratio of the projection image is set on the panel coordinate system based on the position of the first target frame TF1 on the panel coordinate system. The ratio of the size of the second target frame TF2 to the whole panel coordinate system is obtained as a zoom ratio. |
