Adaptive enlarging and/or sharpening of a digital image
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United States of America Patent
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Issued Date -
Oct 9, 2003
app pub date -
Apr 5, 2002
filing date -
Apr 5, 2002
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to enlarging and/or sharpening a digital input image into a resized and/or sharpened digital output image, where the enlargement technique is performed in accordance with the input image content. An enlarged approximated version of an original image is combined with a residual image to produce an output image of desired size. The approximated image is computed by a two-dimensional (2-D) approximation. The residual image is the same size as the original image, or may be enlarged to the size of the desired output image. The residual image data is selectively added to the approximated image such that image information is added everywhere in the image except at continuous edges.
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