Image processing apparatus which separates an image signal accor

Details Image processing apparatus which separates an image signal accor Image processing apparatus which separates an image signal accor

1995-06-07

1999-02-23

Wong, Peter S.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358518, 358456, 382162, G03F 308, G06K 900

Patent

active

058750363

ABSTRACT:
An image processing apparatus in which a density band separating circuit separates an image signal having different density levels into two areas as determined by a threshold density level. Image signals above the threshold are defined as shadow section density signals, and those below are defined as other density signals. The shadow section density signals are smoothed in a smoothing filter. The smoothed shadow section density signals and the other density signals are recombined by a look-up table process. The recombined density signals are pulse-width modulated to drive a printing device.

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