Image information recorder having a resolution density transform

Details Image information recorder having a resolution density transform Image information recorder having a resolution density transform

1991-01-03

1992-06-16

Harkcom, Gary V.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340731, 382 47, G06F 1520

Patent

active

051230828

ABSTRACT:
An image information recorder, including a printer capable of continuous printing in the direction of scanning lines, for reproducing binary input data of an image of a resolution density of 400 dpi (dots per inch) in a form of a visual image of the resolution density of 600 dpi. The input data of 400 dpi is transformed into multi-value image data of 600 dpi in accordance with two-dimensional filtering, which is converted into an analog image signal. The analog image signal is smoothed by a low pass filter, and then the smoothed analog image signal is binarized by a constant threshold signal, whereby an output binary image data of 600 dpi is produced.

REFERENCES:
patent: 4259694 (1981-03-01), Liao
patent: 4501016 (1985-02-01), Persoon et al.
patent: 4760463 (1988-07-01), Nonoyama et al.
patent: 4797741 (1989-01-01), Sato et al.
patent: 4821337 (1989-04-01), Alm
patent: 4829587 (1989-05-01), Glazer et al.

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