Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1985-07-25
1987-09-08
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358283, 358284, 382 54, 382 56, H04N 140
Patent
active
046928111
ABSTRACT:
The invention relates to a method for processing an image signal such that areas of original image data are sequentially scanned with a scanning window having a size corresponding to M picture elements in units of a predetermined number of picture elements so as to perform halftone display in accordance with black-and-white binary distribution with respect to the signal levels of the picture elements within the scanning window every time the scanning window is moved. The picture elements within the scanning window are assigned an order of preference in accordance with their image signal levels. A sum of the image signal levels of the picture elements within the scanning window is calculated, and A and N of the equations S=C.times.N+A are calculated, where C is a predetermined image signal level (e.g., black level and maximum level), N is an integer, and A is the image signal level falling within the range O.ltoreq.A<C. As a result of the preference operation, N picture elements are assigned a level C, the next picture element is assigned a level A, and the remaining picture elements, O. In order to impart regularity to the converted image signal distribution, additional data is added to the preference data.
REFERENCES:
patent: 4491963 (1985-01-01), Bellemare
patent: 4520395 (1985-05-01), Abe
patent: 4578711 (1986-03-01), White et al.
patent: 4586089 (1986-04-01), Nakazato et al.
patent: 4590606 (1986-05-01), Rohrer
Kurosawa Toshiharu
Maruyama Yuuji
Nakazato Katsuo
Otsuka Hirotaka
Tsuchiya Hiroyoshi
Coles Sr. Edward L.
Matsushita Electric - Industrial Co., Ltd.
LandOfFree
Apparatus for processing image signal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for processing image signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for processing image signal will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2162025