Adjusting film grain properties in digital images
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United States of America Patent
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Jun 24, 1997
Grant Date -
N/A
app pub date -
Dec 5, 1995
filing date -
Dec 5, 1995
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A method is disclosed of operating on a stored digital image produced by scanning the photographic element to smooth film-grain noise. The method includes extracting and storing a set of statistics of the grain pattern of the film type carrying the image, such statistics being representative of local, spatial, and spectral properties of a photographic grain pattern of that type of film; and using the stored set of statistics to operate upon the stored digital image to change such stored digital image so as to smooth film-grain noise when an image is produced.
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