Image recording apparatus with a plurality of photosensitive mat

Details Image recording apparatus with a plurality of photosensitive mat Image recording apparatus with a plurality of photosensitive mat

1997-12-19

1999-07-13

Metjahic, Safet

Photocopying

Projection printing and copying cameras

With developing

355 32, 355 40, 430199, G03B 2772, G03B 2780

Patent

active

059234040

ABSTRACT:
An average density of an image is calculated based on image data of an original and a calculated average density is compared with a previously determined threshold value. When the average density is less than or equal to the threshold value, the image is recorded on a negative photosensitive material of which density becomes higher with an increase in exposure amount. When the average density exceeds the threshold value, the image is recorded on a positive photosensitive material of which density becomes low with an increase in exposure amount. When the average density is less than or equal to the threshold value and the image is recorded on the positive photosensitive material, a density value of image data is converted to be suitable for the positive photosensitive material and when the average density exceeds the threshold value and the image is recorded on the negative photosensitive material, a density value of image data is converted to be suitable for the negative photosensitive material.

REFERENCES:
patent: 4734763 (1988-03-01), Urabe et al.
patent: 5504555 (1996-04-01), Yamamoto
patent: 5661542 (1997-08-01), Morita
patent: 5699144 (1997-12-01), Takagi
patent: 5748283 (1998-05-01), Sunagawa et al.

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