Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1990-06-04
1991-12-24
Ng, Jin F.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 80, H04N 146
Patent
active
050757679
ABSTRACT:
A digital color image signal processing apparatus includes a signal generator that generates a plurality of color component signals and converting circuitry that converts each of the color component signals into a plurality of output signals. A discriminator circuit determines which of the color component signals has minimum value. The minimum value color component signal is used as a basis for selecting at least one of the plurality of output signals which is utilized to obtain each final color signal used for image formation. This apparatus may include a density converter for converting color component signals to density signals, wherein at least one of the density signals is selected for use in image formation in response to the determination by the discriminator circuit of which of the color component signals has a minimum value. Accordingly, this apparatus improves image gradation in low density level areas without requiring large scale processing circuits.
REFERENCES:
patent: 4511989 (1985-04-01), Sakamoto
patent: 4614967 (1986-09-01), Sayanagi
patent: 4631578 (1986-12-01), Sasaki et al.
patent: 4636844 (1987-01-01), Sasaki
patent: 4642681 (1987-02-01), Ikeda
patent: 4643563 (1987-02-01), Sayanagi
patent: 4661843 (1987-04-01), Sekizawa et al.
patent: 4677421 (1987-06-01), Taniyama
patent: 4682186 (1987-07-01), Sasaki et al.
patent: 4682216 (1987-07-01), Sasaki
patent: 4683492 (1987-07-01), Sugiura et al.
patent: 4700399 (1987-10-01), Yoshida
patent: 4727434 (1988-02-01), Kawamura
patent: 4742399 (1988-05-01), Kitamura
patent: 4800442 (1989-01-01), Riseman et al.
patent: 4819193 (1989-04-01), Imao
Canon Kabushiki Kaisha
Grant II Jerome
Ng Jin F.
LandOfFree
Digital color image signal processing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital color image signal processing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital color image signal processing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-48239