Method and apparatus for printing high quality prints from photo

Details Method and apparatus for printing high quality prints from photo Method and apparatus for printing high quality prints from photo

1997-05-16

2000-05-30

Mathews, Alan A.

Photocopying

Projection printing and copying cameras

Illumination systems or details

355 38, 355 41, 355 77, G03B 2752, G03B 2780

Patent

active

060696850

ABSTRACT:
A method and apparatus for printing high quality prints from photographic negatives employ a printer with a system that scans the negatives optical densities region by region. Corresponding quantities of light are calculated, the first prints are then printed using these quantities, and thereafter these quantities are stored in a memory to be retrieved at a later time for duplicate prints. To locate the stored values representing the first printing light quantities, the densities employed to calculate the light quantities are associated with those quantities in the memory. The negatives are scanned again when the subsequent prints are to be printed. The measured densities are then compared with the densities stored during the first printing process. If and when the results are similar, the identity of the two negatives is confirmed and the first printing light quantities are obtained from the memory and employed for producing the subsequent prints.

REFERENCES:
patent: 4150894 (1979-04-01), Meyer et al.
patent: 4279502 (1981-07-01), Thurm et al.
patent: 4797713 (1989-01-01), Tershita et al.
patent: 5029312 (1991-07-01), Goenner
patent: 5192970 (1993-03-01), Findeis et al.
patent: 5357315 (1994-10-01), Suzuki
patent: 5561494 (1996-10-01), Terashita

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