Digital image processing circuitry

Details Digital image processing circuitry Digital image processing circuitry

1991-07-30

1993-08-17

Coles, Sr., Edward L.

Facsimile and static presentation processing

Natural color facsimile

Color correction

358500, 358 37, 358166, G03F 308, H04N 146, H04N 964, H04N 514

Patent

active

052374025

ABSTRACT:
Improved digital image processing circuitry for sharpening edges and details of a recorded image digitally while minimizing the amplification of noise in the input recorded image provides an output recorded image which is the sum of chrominance signals processed by color processing circuitry and luminance signals processed by color processing circuitry and sharpness circuitry. Input recorded images are provided for concurrent parallel processing by both the color processing circuitry and the sharpening circuitry in a manner whereby the color processing circuitry generates low spatial frequency luminance signals and the sharpness circuitry generates high spatial frequency luminance signals both of which are subsequently combined to provide an output signal in which the amplitude of the high spatial frequency noise component associated therewith is minimized.

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