High resolution thermal printing by imaging a hard copy image in

Details High resolution thermal printing by imaging a hard copy image in High resolution thermal printing by imaging a hard copy image in

1991-09-06

1993-01-26

Fuller, Benjamin R.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358486, 358497, 358483, 35821328, H04N 1028, H04N 104, H04N 121, H04N 123, H04N 140

Patent

active

051826526

ABSTRACT:
An apparatus and method for generating a high resolution image for a thermal printer from a video imager having a plurality of pixels with a preselected pitch comprises dithering the video imager. The video imager is dithered at less than the pitch of the pixels and provides arrays of data representing video imager positions generated by halfstep offsets of the video imager in the horizontal and vertical directions. The halfstep movement of the video imager causes the pixels to map a new area of an image without overlap of a previously mapped area. The dithered arrays are transmitted to a thermal printer so that the printed image contains more information than is generated by a static video imager.

REFERENCES:
patent: 4607287 (1986-08-01), Endo
patent: 4638371 (1987-01-01), Milch
patent: 4668978 (1987-05-01), Gokita

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