Constant speed image reading device and method

Details Constant speed image reading device and method Constant speed image reading device and method

2005-06-14

2005-06-14

Wallerson, Mark (Department: 2622)

Facsimile and static presentation processing

Facsimile

Picture signal generator

C358S474000, C358S444000, C355S077000, C355S040000

Reexamination Certificate

active

06906833

ABSTRACT:
An image reading device in which a processing time required for prescanning and fine-scanning of a film can be shortened. A reading system for prescanning which performs prescanning and a reading system for fine-scanning which performs fine-scanning are adjacently juxtaposed on a conveying path of a photographic film. Prescanning is carried out by the reading system for prescanning, which is structured such that light that is emitted from a light source is transmitted through the photographic film, which is conveyed at a constant speed which is suitable for fine-scanning, the light is detected by a linear CCD, and frame images at the photographic film are thereby preliminarily read. Then, fine-scanning is carried out with the photographic film being conveyed at the same speed and the frame images on the photographic film being read at the reading system for fine-scanning by a quantity of light controlled on the basis of reading results of prescanning.

REFERENCES:
patent: 5448377 (1995-09-01), Kinoshita et al.
patent: 5475493 (1995-12-01), Yamana
patent: 5488450 (1996-01-01), Tanibata
patent: 5745262 (1998-04-01), Tatsumi
patent: 6266127 (2001-07-01), Iida
patent: 11-075028 (1999-03-01), None

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