Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1984-03-01
1987-07-21
Groody, James J.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 75, 358 80, 358284, 358296, 346140R, G03F 308, H04N 140, H04N 146, G01D 1516
Patent
active
046822160
ABSTRACT:
Color image picture forming process and apparatus can provide a picture with smooth shadow portions without false contours. When a black component of a color picture data is smaller than a predetermined value, the black component is expressed by using the combination of cyan, magenta and yellow colorants. When the black component is larger than the predetermined value, it is expressed by alternately using the black colorant and the three colorant combination. In another embodiment, picture quality can be enhanced by using a black colorant having a higher density than the cyan, magenta and yellow colorants.
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Kawamura Hideaki
Moriyama Jiro
Sakurada Nobuaki
Sasaki Takashi
Canon Kabushiki Kaisha
Groody James J.
Svihla Randall S.
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