Image processing apparatus

Details Image processing apparatus Image processing apparatus

1992-06-19

1993-04-06

Brinich, Stephen

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358429, H04N 140

Patent

active

052008398

ABSTRACT:
In an image processing apparatus which performs pseudo-halftone processing of multivalue image data, the multivalue image data are subjected to partial removal processing in accordance with an assigned reduction ratio, and the resultant multivalue data are then subjected to binary-coding processing. In partial removal processing, data of a removed picture element are reflected upon data of adjacent picture elements. Binary-coding processing is performed by referring to binary data of a predetermined region subjected to binary-coding processing. It is thereby possible to obtain an image having excellent gradation and resolution in a short time with a simple configuration of hardware, and to obtain an image not having deterioration of picture quality even in image reduction.

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R. Floyd and L. Steinberg, "An Adaptive Algorithm for Spatial Grey Scale," SID 75 Digest, pp. 36-37.

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