Image processing apparatus

Details Image processing apparatus Image processing apparatus

1991-03-28

1994-02-22

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358463, 382 54, H04N 140, H04N 138

Patent

active

052892948

ABSTRACT:
An image processing apparatus comprises a first correction part for correcting an error of an input multilevel tone data so that a corrected data having a speficied number of bits is supplied, a multilevel rendition part for generating a multilevel rendition data and an error data from the corrected data being compared with a plurality of predetermined threshold levels, an error diffusion part for carrying out a prescribed error diffusion of the error data and for supplying a resulting error data for use in an error correction process of a subsequent data, and a second correction part for correcting the multilevel rendition data by a specified bit of the input multilevel tone data so that a corrected multilevel image data that is appropriate for being outputted by an output unit in which a multilevel tone data is assigned to each pixel included in an output image data is supplied.

REFERENCES:
patent: 4876610 (1989-10-01), Ohsawa et al.
patent: 4958238 (1990-09-01), Katayama et al.
patent: 5077615 (1991-12-01), Tsuji
patent: 5077812 (1991-12-01), Kanno et al.
patent: 5231677 (1993-07-01), Mita et al.
H. Kotera, "Digital Halftoning," Institute of Television Engineers of Japan, vol. 40, No. 4, (1986), pp. 317-323.

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-176061