Image processing apparatus employing error diffusion type binari

Details Image processing apparatus employing error diffusion type binari Image processing apparatus employing error diffusion type binari

1995-09-19

2000-09-05

Kelley, Christopher S.

Image analysis

Image enhancement or restoration

Variable threshold, gain, or slice level

358455, 358466, G06K 938

Patent

active

061155047

ABSTRACT:
Digital image data read in by an image scanner is added with a binary error calculated by a peripheral error weighting filter in an error adder to correct binary error. The corrected data is compared with a predetermined threshold value T.sub.0 by a comparator provide output as binary data. A binary error calculation unit calculates a binary error according to the output binary data and error correction data, which is fed back to the digital image data. A variable base value calculation unit for providing to the binary error calculation unit a base value to calculate calculation error and a maximum value/minimum value detection unit are provided outside the feedback loop.

REFERENCES:
patent: 4958238 (1990-09-01), Katayama et al.
patent: 4975786 (1990-12-01), Katayama et al.
patent: 5045952 (1991-09-01), Eschbach
patent: 5060284 (1991-10-01), Klees
patent: 5068746 (1991-11-01), Ohsawa et al.
patent: 5077812 (1991-12-01), Kanno et al.
patent: 5307425 (1994-04-01), Otsuka
patent: 5307426 (1994-04-01), Kanno et al.

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2221010