System and method for providing a high addressable printing syst

Details System and method for providing a high addressable printing syst System and method for providing a high addressable printing syst

1995-11-15

1997-08-05

Vu, Kim

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358455, 358456, 358447, 358428, 382299, G06F 1500, H04N 140, H04N 141, G06K 942

Patent

active

056550618

ABSTRACT:
A system and process prints a high resolution image on a high addressable image output terminal by converting an image at one resolution to an image having a lower resolution in a fast-scan direction and a higher resolution in a pixel depth direction. The converted image is then processed and binarized prior to being printed on a high addressable printer. The system or process utilizes a conversion circuit which includes a two-bit per pixel packing circuit, a scanline buffer circuit, a logic circuit, and a look-up table. The conversion circuit initially converts the image into an image having a lower resolution in the fast-scan direction and a higher pixel depth resolution. Thereafter, the image is further converted to an image having a lower resolution in the slow-scan direction and a higher pixel depth resolution. This conversion of a high resolution image to a lower resolution is carried without any substantial lost to the image content data.

REFERENCES:
patent: 5258854 (1993-11-01), Eschbach
patent: 5387985 (1995-02-01), Loce et al.
patent: 5430555 (1995-07-01), Sawada et al.
patent: 5479175 (1995-12-01), Cianciosi et al.
patent: 5479584 (1995-12-01), Curry
patent: 5502495 (1996-03-01), Bannai et al.
patent: 5553171 (1996-09-01), Lin et al.

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