Image processing method and apparatus for achieving tone reproduction suited to the image
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United States of America Patent
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-
Apr 8, 2003
Issued Date -
N/A
app pub date -
May 15, 1995
filing date -
Dec 19, 1990
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Digital image data corresponding to an original read in by a CCD is stored in a page memory in pixel units, and a CPU reads the stored image data and creates a histogram. For an original having many high-density portions, an image is formed using a LOG conversion table which generates density data that enables reproduction of the tonality of the high-density portions. For an original which is comparatively faint, an image is formed using a LOG conversion table which generates density data that assures tone reproduction up to the maximum density of the original even if high-density portions cannot be reproduced. As a result, tone reproduction suited to the original image can be realized at all times.
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Cited Art Landscape
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