Facsimile and static presentation processing – Facsimile – Reduced time or bandwidth for static image communication
Patent
1988-10-17
1990-01-16
Coles, Jr., Edward L.
Facsimile and static presentation processing
Facsimile
Reduced time or bandwidth for static image communication
358443, H04N 140
Patent
active
048947270
ABSTRACT:
An image processing system processes an input image data related to a dot image which is obtained by scanning a document in a scanning direction. The image processing system smoothens a density of a dot image based on a predetermined smoothing matrix and successively outputs smoothened picture element data which constitute an image data, delays the smoothened picture element data by a predetermined time in the scanning direction, successively averages two picture element data having a mutual time difference equal to the predetermined time and outputs average values, and subjects the average values to a pseudo halftone process.
REFERENCES:
patent: 4194221 (1980-03-01), Stoffel
patent: 4222077 (1980-09-01), Yamada
patent: 4366507 (1982-12-01), Mori
patent: 4389672 (1983-05-01), Bowen
patent: 4733300 (1988-03-01), Sugiyama
Coles, Jr. Edward L.
Grant Jerome
Ricoh & Company, Ltd.
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