Edge smoothness with low resolution projected images for use in solid imaging
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United States of America Patent
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Jul 20, 2010
Grant Date -
Oct 26, 2006
app pub date -
Apr 1, 2005
filing date -
Apr 1, 2005
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Abstract
A solid imaging apparatus and method employing sub-pixel shifting in multiple exposures of the digitally light projected image of a cross-section of a three-dimensional object on a solidifiable liquid medium. The multiple exposures provide increased resolution, preserving image features in a three-dimensional object and smoothing out rough or uneven edges that would otherwise be occur using digital light projectors that are limited by the number of pixels in an image projected over the size of the image. Algorithms are used to select pixels to be illuminated within the boundary of each image projected in the cross-section being exposed.
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