US PATENT SUBCLASS 382 / 274
.~ Intensity, brightness, contrast, or shading correction

Current as of: June, 1999
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382 /   HD   IMAGE ANALYSIS

254  DF  IMAGE ENHANCEMENT OR RESTORATION {7}
274.~ Intensity, brightness, contrast, or shading correction

DEFINITION

Classification: 382/274

Intensity, brightness, contrast or shading correction:

(under subclass 254) Subject matter which involves correcting pixel* values for variations in ambient lighting or the optimum brightness, intensity or contrast range of an image to enhance desired image features.

(1) Note. Systems which use feedback from image processing in order to control the intensity of an illumination source are included herein.

(2) Note. Adjusting intensity or color according to light sources, surface characteristics and object orientation in a computer s:graphics/data presentation system is classified in class 395, subclass 126.

SEE OR SEARCH CLASS

250, Radiant Energy,

205, for intensity control of light sources.

345, Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems,

20, 63, 77, 147+, and 429+ for correcting, adjusting, or controlling the intensity, brightness, or contrast for shading of an image for display presentation. 348, Television,

251, and 254 for shading and grey-level correction of television signals.

358, Facsimile,

461, for shading correction in facsimile systems.