Slide scanner

Details Slide scanner Slide scanner

1987-07-22

1990-03-06

Boudreau, Leo H.

Image analysis

Histogram processing

For setting a threshold

356404, 356418, 358 75, 358901, 382 56, 382 67, G06K 900

Patent

active

049072803

ABSTRACT:
A color slide transparency scanner projects an intense stripe of light through a color slide. Red, green, and blue filters successively filter the stripe of image from the slide. In some applications, a neutral density filter adds still more information from dark areas of the slide image. A carriage carrying the slide moves across the light. A CCD array detects the filtered images and converts them to analog electrical signals. Circuitry converts the analog signals to digital.

REFERENCES:
patent: 4413276 (1983-11-01), Hertz et al.
patent: 4490740 (1984-12-01), Moriguchi
patent: 4646252 (1987-02-01), Terashita
patent: 4674834 (1987-06-01), Margolin
patent: 4736251 (1988-04-01), Sasaoka
patent: 4748680 (1988-05-01), Margolin

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