Image formation apparatus having a gradation control unit

Details Image formation apparatus having a gradation control unit Image formation apparatus having a gradation control unit

1994-03-31

1997-12-09

Coles, Sr., Edward L.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358298, 358459, H04N 140

Patent

active

056966032

ABSTRACT:
An image formation apparatus for conducting gradation recording by changing the size of dots on the basis of inputted image data, has a memory unit for storing a plurality of input image level-print output level characteristics for effecting gradation correction to the inputted image data, and a gradation correction unit for selecting different input image-print output level characteristics from the memory unit in each 1
period of a transmission period of the inputted image data when n is a natural number of 2 or more, and determining the size of dots to be printed, in accordance with this output level. The apparatus can minimize the drop of resolution, can improve gradation, and can satisfy both gradation and resolution in good balance.

REFERENCES:
patent: 4700235 (1987-10-01), Gall
patent: 5386305 (1995-01-01), Usami
patent: 5475496 (1995-12-01), Kumada
patent: 5479272 (1995-12-01), Saito
patent: 5579451 (1996-11-01), Suzuki

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