Index printer having density correction using a standard image

Details Index printer having density correction using a standard image Index printer having density correction using a standard image

1996-10-03

1999-02-09

Moses, Richard

Photocopying

Projection printing and copying cameras

Identifying, composing, or selecting

355 35, 355 38, 355 67, 355 68, 355 70, 355 71, G03B 2752, G03B 2772, G03B 2780, G03B 2754

Patent

active

058701753

ABSTRACT:
An index printer in which density correction can be reliably effected and in which an appropriate image can be printed is obtained. When a standard image data such as a so-called Bull's eye is input from an image memory to a gray image processing portion of a sub-control portion, data which is greater than a predetermined threshold value Q is extracted from the standard image data and is averaged so as to set a standard gray image. The set standard gray image is displayed on a whole surface of a display surface of a liquid crystal panel via a liquid crystal panel driver, and is printed onto a photographic printing paper by a light source.

REFERENCES:
patent: 5223892 (1993-06-01), Ikenoue et al.
patent: 5703671 (1996-08-01), Narita et al.

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