US PATENT SUBCLASS 358 / 458
.~.~.~.~.~ Gradation or spatial processing

Current as of: June, 1999
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358 /   HD   FACSIMILE AND STATIC PRESENTATION PROCESSING

400  DF  FACSIMILE {17}
443  DF  .~ Specific signal processing circuitry {7}
448  DF  .~.~ Image processing {12}
455  DF  .~.~.~ Gray level processing {2}
456  DF  .~.~.~.~ Halftone {4}
458.~.~.~.~.~ Gradation or spatial processing

DEFINITION

Classification: 358/458

Gradation or spatial processing:

(under subclass 456) Subject matter wherein a relationship between the optical density of an image and a signal level is controlled or an image is processed to provide emphasis in a specific frequency range.