Method for improving the contrast in photographic film materials

Details Method for improving the contrast in photographic film materials Method for improving the contrast in photographic film materials

1995-09-29

1998-01-20

Rogers, Scott A.

Image analysis

Image enhancement or restoration

Intensity, brightness, contrast, or shading correction

382132, G06T 500

Patent

active

057108412

ABSTRACT:
Described herein is an arrangement for correcting the contrast of X-ray images to reveal details which are not otherwise visible. The arrangement comprises a conventional illumination box (10) for illuminating an X-ray (12), a camera arrangement (14) for viewing the illuminated X-ray film (12), the camera arrangement (14) including a camera unit (18) having a lens (20) mounted in a light tight box (16), a processing unit (22), and display means (24, 28) for displaying an image with the corrected contrast. The contrast is corrected using the characteristic curve of the processed film material on which the X-ray image is recorded in accordance with the following equation: ##EQU1## where E is the exposure,

REFERENCES:
patent: 4907288 (1990-03-01), Shimoni
patent: 5012333 (1991-04-01), Lee et al.
patent: 5481480 (1996-01-01), Green et al.

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