| 摘要 |
An image projector includes a grid display device and projects the image formed on the grid display device onto a screen. While projecting a test image onto the screen to form distorted image thereon, four apexes of the screen is pointed by a pointing device. The image projector calculates correction parameters based on the differences of the coordinates between the specified apexes and the apexes of the distorted image, and corrects a desired image based on the correction parameters.
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