Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1991-04-03
1994-04-19
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358445, H04N 140
Patent
active
053051165
ABSTRACT:
An image transmission device is capable of transmitting image data in different resolutions with different pixel number of the image. The gamma correction values are converted in proportion to the transmittal resolution of the image data and the quasi half-tone which closely follows the original image is reproduced with less degree of omission of minute lines.
REFERENCES:
patent: 4841375 (1989-06-01), Nakajima et al.
patent: 4970603 (1990-11-01), Kanai
patent: 4974097 (1990-11-01), Kaneko et al.
patent: 5041915 (1991-08-01), Hirota et al.
Canon Kabushiki Kaisha
Coles Sr. Edward L.
Grant II Jerome
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