Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1992-04-13
1994-01-11
Coles, Sr., Edward L.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
358465, 358466, H04N 140
Patent
active
052786722
ABSTRACT:
An image signal processing apparatus converting an image signal representing a continuous tone image into an image signal indicating a halftone dot image. The continuous tone image signal is compared with a threshold signal. If the difference between the continuous tone image signal and the threshold signal falls within a predetermined range, then the halftone dot image signal is produced based on a probabilistically established signal. The halftone dot image thus produced is smooth without an appreciable tone jump.
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Coles Sr. Edward L.
Fuji Photo Film Co. , Ltd.
Grant, II J.
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