Scanned document image resolution enhancement
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United States of America Patent
Stats
-
Nov 12, 1991
Grant Date -
N/A
app pub date -
Nov 9, 1989
filing date -
Nov 9, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Method and apparatus for providing high resolution images for static display of document pages that are scanned in through a document scanner at high resolution, with reduced bandwidth requirements. In one embodiment, groups of four scanned image pixel values, each one bit in length, are reduced to a single two-bit pixel value that determines a pixel value for a display image pixel; and selected displayed image pixel values are periodically varied between the original displayed image pixel value and an alternative pixel value to restore the perception of high resolution available in the scanned image.
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Cited Art Landscape
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