Patent ID: 7226173
Filing Date: 2007-06-05
Classification: G01B,G03B,H04N

Abstract:
1. A projector comprising: a projection device having a projection lens; a focus adjuster for adjusting the focus of said projection lens; a zoom adjuster for adjusting the zooming of said projection lens; an imager having a plurality of cameras for capturing respective images of a projection object; a projection area calculator for calculating a projection area of an image depending on a distance from the projection lens based on a zoomed position from said zoom adjuster; a three-dimensional position detector for detecting a three-dimensional position of a predetermined object point corresponding to identical object points in the respective images captured by said cameras from the images captured by said cameras and the projection area of the image calculated by said projection area calculator; a distance detector for detecting the distance up to the object point from the three-dimensional position of said predetermined object point; an image controller for controlling a projected image; an image information generator generating image information; a projection surface detector for detecting distances up to said object points from the three-dimensional positions of a plurality of said predetermined object points which are detected by said three-dimensional position detector and arranging the detected distances two-dimensionally; and a pointed position detector for detecting an obstacle having a predetermined shape which is interposed between a predetermined area of the projected image which is projected onto said projection object as a pointing command; wherein said object points are indicated two-dimensionally on the projected image which is projected onto said projection object; said pointed position detector compares distances up to said object points with said projection surface detector, extracts a group of a plurality of said object points which are disposed on a surface of the projection, object and disposed in a predetermined shape at shorter distances, defines the extracted group as the pointing command, acquires two-dimensional positions of said group, and outputs the acquired two-dimensional positions of said group to said image information generator; and said image information generator reads contents of the pointing command from the two-dimensional positions of said group input thereto, performs a process corresponding to the pointing command, adds corresponding information to said image information, and outputs the image information with the added information to said image controller.