Method of and apparatus for processing an image

Details Method of and apparatus for processing an image Method of and apparatus for processing an image

1994-09-13

1996-12-10

Vu, Kim Yen

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358448, 358455, 358465, 358466, H04N 140

Patent

active

055836615

ABSTRACT:
An image is processed by using an error diffusion method of propagating density distribution errors in pixels around a pixel to be noted. A method includes the steps of calculating thresholds (Th.sub.1, Th.sub.2) of densities corresponding to the area ratio between the pixels; selecting a pixel to be noted (f) which are different in the area ratio from each other; calculating errors (E) produced in the peripheral pixels according to the distances from the peripheral pixels to the noted pixel and areas of the individual peripheral pixels; adding the propagated errors to a density of the noted pixel so as to make a rearrangement (f') on the density of the noted pixel; comparing the rearranged density of the noted pixel with the thresholds to obtain a corresponding level (G) represented in a binary form, and obtaining density distribution errors (e).

REFERENCES:
patent: 4626923 (1986-12-01), Yoshida
patent: 5008950 (1991-04-01), Katayama et al.
patent: 5245678 (1993-09-01), Eschbach et al.
patent: 5307426 (1994-04-01), Kanno et al.
patent: 5351137 (1994-09-01), Kato et al.
patent: 5418626 (1995-05-01), Semasa
patent: 5459587 (1995-10-01), Fukushima
patent: 5488673 (1996-01-01), Katayama

Affiliated with

Also associated with

Rating

Method of and apparatus for processing an image does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of and apparatus for processing an image, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of and apparatus for processing an image will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-428158