Electronic printing method

Details Electronic printing method Electronic printing method

1986-04-23

1987-07-21

Prescott, A. C.

Photocopying

Projection printing and copying cameras

Multicolor picture

355 37, 355 38, 355 67, 355 8, 358 75, H04N 146, G03B 3312

Patent

active

046814272

ABSTRACT:
An electronic printing method by which originals are photographically reproduced by exposing high-contrast copy material with an intensity modulated illumination source that coarsely scans the original while the original is sharply imaged with a well-corrected optical system. The source intensity is modulated to compensate for the original's tonal qualities and electronically shapes the response of the copy material to enhance tonal reproduction. The imaging system in conjunction with the high-contrast material assures high reproduction of detail. The method enhances copy sharpness and reduces copy time, memory and computational needs otherwise required for copies of comparable quality.

REFERENCES:
patent: 3622690 (1971-11-01), Stephens et al.
patent: 4175856 (1979-11-01), Pone, Jr.
patent: 4206998 (1980-06-01), Tokuda
patent: 4371260 (1983-02-01), Yoshimoto et al.
patent: 4610536 (1986-09-01), Smyth et al.

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