Projection type image display apparatus and control method therefor
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United States of America Patent
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Jan 24, 2017
Grant Date -
Mar 31, 2016
app pub date -
Sep 17, 2015
filing date -
Sep 25, 2014
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Abstract
An image display apparatus betters adjustment precision in the multi-projection in which two projection images are combined so that the images partially overlap each other. A display apparatus configuring an image projection system configured to project an image by combining on a screen a plurality of projection images so that the images partially overlap each other, includes a transformation unit configured to perform a geometrical transformation on a projection image, and a setting unit configured to set a parameter of the transformation by the transformation unit based on a relation between a position of an overlap region in a projection image obtained before the transformation by the transformation unit is performed, and a position of the overlap region in the projection image obtained after the transformation is performed, wherein an amount or value of the transformation is changed according to the position of a vertex of the overlap region.
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