Image output apparatus

Details Image output apparatus Image output apparatus

1997-04-15

1999-12-07

Au, Amelia

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358298, 358462, G03G 1500

Patent

active

059997044

ABSTRACT:
In printing a pseudo half tone image, the pulse width of an image data pulse is reduced, so that when isolated dots in the image are printed, the isolated dot part become whitish and repeatability may be lowered. A region division section judges whether the data are binary data of characters or the pseudo half tone image data. For the pseudo half tone image data, a dot pattern identification section discriminates consecutive dots from isolated dots. An image data pulse control section controlls the pulse width of the image data pulse in accordance with the result of the identification. A printer engine performs print as output with each dot of which dimension is dependent on the controlled pulse width. Therefore when the image with characters and pictures mixed together is output, the printing as output can be performed in accordance with the character region and the pseudo half tone image region.

REFERENCES:
patent: 4588841 (1986-05-01), Shimada
patent: 4709274 (1987-11-01), Tanioka
patent: 5294996 (1994-03-01), Sobue
patent: 5301271 (1994-04-01), Hiratsuka et al.
patent: 5565907 (1996-10-01), Wada et al.
patent: 5657071 (1997-08-01), Shinohara
patent: 5708514 (1998-01-01), Higuchi et al.

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