| 摘要 |
A projection display unit, in which a distortion of an image is corrected even when the image is projected from an arbitrary direction, further which can correct a distortion caused by that an image is projected on a screen surface having an irregular surface or a free surface, is provided. The projection display unit provides an image inputting means to which an original image is inputted, a screen surface obtaining means for obtaining a three dimensional shape of a screen surface by calculating an azimuth angle, a tilt angle, and a distance of the screen surface for the projection display unit by using the normal line vector of the screen surface, an image correcting means for executing an inclination correction and a zooming in/out correction for the original image corresponding to the three dimensional shape of the screen surface, and an image outputting means for outputting the corrected image as a projecting image.
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