Patent ID: 8393740
Filing Date: 2013-03-12
Classification: H04N

Abstract:
1. An image projection system comprising: a projector comprising a display unit including a plurality of pixels to display a graphic for projection to a projection screen to form a projected image; a capture device constructed to capture an orientation of the projected image from the projection screen; and a control unit constructed to control the projector to project an uncorrected graphic from the display unit, to control the capture device to capture the orientation of the uncorrected image relative to the projection screen, to derive a transformation which is applied by the control unit so as to transform the uncorrected graphic into a pre-distorted graphic, and to control the projector to project the pre-distorted graphic from the display unit to form a corrected image, wherein the transformation is such that the corrected image counterpart to the pre-distorted graphic has an orientation more aligned with the projection screen than the orientation of the uncorrected image and such that the pre-distorted graphic utilizes more pixels in the display unit than a second pre-distorted graphic, wherein the second pre-distorted graphic is calculated by transforming the uncorrected graphic so that the second pre-distorted graphic forms a second corrected image with a maximum rectangular area inside the uncorrected image projected from the display unit onto the projection screen.