| 摘要 |
PROBLEM TO BE SOLVED: To enable stable detection of an irradiation point of light from an irradiation device.SOLUTION: In pointing a projection image, which is projected through a plurality of colors of filter segments included in a color wheel, with a pointer by using a laser pointer, when projection light from the filter segment having a color close to that of the laser pointer is not projected on a projection surface, an image projection device photographs an image of the projection surface through a camera unit during a timing A, particularly, during a setting exposure time 1 and setting exposure time 2. |
