Systems and methods for producing high-contrast, intensity equal

Details Systems and methods for producing high-contrast, intensity equal Systems and methods for producing high-contrast, intensity equal

1989-09-28

1997-06-17

Boudreau, Leo

Image analysis

Image enhancement or restoration

Intensity, brightness, contrast, or shading correction

382169, 348672, 348673, G06K 940

Patent

active

056404697

ABSTRACT:
Systems and methods for improving the intensity equalization of image data obtained with systems that perceive images with energy sources other than visible light includes a sensor for such data; a converter for transforming the image data from analog form to digital form; a converter for transforming the digital data into black-and-white images containing a predetermined, desired number of gray shades; an intensity equalizer that compensates for the logarithmic effect of visual images on a human eye; an intensity equalizer that compensates for the non-linear effect of the display device for the data; and a converter for transforming the digital intensity-equalized black-and-white image data into analog form for display on a device such as a conventional CRT.

REFERENCES:
patent: 4386345 (1983-05-01), Narveson et al.
patent: 4589022 (1986-05-01), Prince et al.
patent: 4610026 (1986-09-01), Tabata et al.
patent: 5060081 (1991-10-01), Shimura
patent: 5063607 (1991-11-01), Fitzhenry et al.
Xoe et al, "Toward the Unification of Three Visual Laws and Two Visual Models in Brightness Perception", IEEE Transactions on Systems, Man, and Cybernetics, vol. 19, No. 2, Mar./Apr. 1989.

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