Film image reading system

Details Film image reading system Film image reading system

1996-05-23

1998-05-12

Lee, Thomas D.

Facsimile and static presentation processing

Natural color facsimile

Color photography previewer

358530, 358487, 358518, 382167, H04N 146

Patent

active

057514518

ABSTRACT:
A film image reading system includes: an image pickup device which picks up a light image of an image recorded on a film to produce raw image signals corresponding to three colors of the light image and indicative of magnitudes corresponding to light amounts of their respective three colors; a signal processor which processes raw image signals of three colors in accordance with a reference to produce output image signals corresponding to three colors of the light image, the output image signals being operable to ensure a proper color balance; a first calculator which calculates differences between a high magnitude image signal of a particular color and respective high magnitude image signals of the remaining colors; and a second calculator which calculates differences between an average magnitude image signal of the particular color and average magnitude image signals of the remaining colors; and a reference changer which changes the reference of the signal processor based on differences calculated by the first and second calculators.

REFERENCES:
patent: 4339517 (1982-07-01), Akimoto
patent: 5132788 (1992-07-01), Hirota
patent: 5138443 (1992-08-01), Ikeda et al.
patent: 5181105 (1993-01-01), Udagawa et al.
patent: 5329383 (1994-07-01), Collette

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