Method and apparatus for correcting noise in a film scanner

Details Method and apparatus for correcting noise in a film scanner Method and apparatus for correcting noise in a film scanner

1995-06-07

1998-07-21

Chevalier, Robert

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

348 97, H04N 591, H04N 336

Patent

active

057845298

ABSTRACT:
In a film scanner, noise caused by fluctuations in the intensity of a light source 100 are corrected by taking a sample 175 of the light source and correcting the image read from, or written to, the film with respect to the sample. Preferably, the sample is routed around a film gate 105 and has a similar optical path as the image sample 125. In this way, noise due to variations in the optical path and additional electronics 185 may also be corrected.

REFERENCES:
patent: 4903131 (1990-02-01), Lingemann et al.
patent: 5012346 (1991-04-01), DeJager et al.
patent: 5155596 (1992-10-01), Kurtz et al.
patent: 5185668 (1993-02-01), Ohta
patent: 5467412 (1995-11-01), Capitant et al.

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