Image processing apparatus

Details Image processing apparatus Image processing apparatus

1987-04-02

1989-09-19

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358456, 358458, H04N 140

Patent

active

048686840

ABSTRACT:
An image processing apparatus is provided by which an image signal is compared with periodic pattern signals to obtain a pulse width modulated image signal. The apparatus comprises picture element generating means for generating picture element signals; discrimination means for discriminating the relation between an attention image picture signal generated from the image signal generating means and the surrounding picture element signals; pattern signal generating means for generating a pattern signal having the waveform a different phase corresponding to the results of discrimination from the discrimination means; and means for generating pulse width-modulated signals based on the picture element signal and pattern signals generated from the pattern signal generating means. The apparatus enables improvement in the reproducibility of fine lines while maintaining the half tone and detection of low-contrast areas thereby improving the image quality.

REFERENCES:
patent: 4547811 (1985-10-01), Ochi et al.
patent: 4763199 (1988-08-01), Suzuki
patent: 4782398 (1988-11-01), Mita

Affiliated with

Also associated with

Rating

Image 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 Image processing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image processing apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-373388