Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1991-01-03
1993-05-11
Coles, Sr., Edward L.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 80, 358474, 358406, H04N 146, H04N 336
Patent
active
052106004
ABSTRACT:
An imaging unit including a line sensor reads a film image to produce color decomposition data by scanning a plurality of lines on the film image in a stepped prescanning operation. During the prescanning operation, the color decomposition data of a plurality of pixels at each of a plurality of sampling points are sampled and added up on a line-by-line basis, and the added color decomposition data are averaged, where corrections including a shading correction are performed concurrently with the adding and averaging operations. During a period of from the end of the prescanning operation to the start of a main scanning operation, on the basis of the averaged color decomposition data, a density correction amount is determined and parameters to be used for correcting the film image in a succeeding actual image processing operation are calculated. The calculated parameters are set in a line memory.
REFERENCES:
patent: 4329717 (1982-05-01), Logie et al.
patent: 4656525 (1987-04-01), Norris
patent: 5060061 (1991-10-01), Shishido et al.
Coles Sr. Edward L.
Fuji 'Xerox Co., Ltd.
Jackson Jill
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