Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1994-10-11
1998-06-02
Lee, Thomas D.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358448, 358458, 382266, H04N 138, H04N 140
Patent
active
057609225
ABSTRACT:
A first converting circuit converts K-level image data, and suppresses a diffusion range of data by an N-level converting circuit. The N-level converting circuit converts a K-level image into an N-level gradation image (K>N). An image memory stores the N-level gradation image. An estimating circuit converts the N-level gradation image into an M-level gradation image (N<M). A second converting circuit returns the M-level gradation image into the form before the conversion according to a conversion amount from the first converting circuit. Accordingly, density ripple can be suppressed even in a small scanning aperture. A control circuit sets a conversion table to the first converting circuit and the second converting circuit according to a setting signal from a control panel, and outputs a control signal to the estimating circuit, so that processing mode is set in response to different images, and image quality is adjusted.
REFERENCES:
patent: 4758897 (1988-07-01), Hiratsuka et al.
patent: 4841377 (1989-06-01), Hiratsuka et al.
patent: 5231677 (1993-07-01), Mita et al.
patent: 5454052 (1995-09-01), Kojima
Lee Thomas D.
Matsushita Electric - Industrial Co., Ltd.
LandOfFree
Area recognizing device and gradation level converting device em does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Area recognizing device and gradation level converting device em, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Area recognizing device and gradation level converting device em will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1466996