Filtering illumination for image lift

Details Filtering illumination for image lift Filtering illumination for image lift

1989-10-10

1992-10-13

Moore, David K.

Image analysis

Histogram processing

For setting a threshold

382 1, 382 65, G06K 900

Patent

active

051557762

ABSTRACT:
Arrangement for lifting image of checks, with Xenon lamp, Fluorescent lamp or like source of stable-wavelength-output and CCPD Camera means selected to exhibit "close-to-human" spectral response plus a photopic filter, disposed upstream of the Camera and adapted to shift its received image-light spectrum in the direction of that which is optimal for the human-eye.

REFERENCES:
patent: 3402299 (1968-09-01), Held
patent: 4084188 (1978-04-01), Gorog et al.
patent: 4547896 (1985-10-01), Ohtombe et al.
patent: 4670779 (1987-06-01), Nagano

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