Image reproducing apparatus and process wherein minimized averag

Details Image reproducing apparatus and process wherein minimized averag Image reproducing apparatus and process wherein minimized averag

1994-09-22

1996-04-09

Rogers, Scott A.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358456, 358458, 358465, 345147, H04N 1405

Patent

active

055066984

ABSTRACT:
Apparatus and process for reproducing apparatus capable of reproducing a source image, wherein an original intensity value determined on the basis of an intensity at each picture element under consideration of the source image is quantized to one of two levels by comparison of the original intensity value with a threshold value, using a minimized average error technique, and wherein the original intensity value at each picture element under consideration is divided into a plurality of fractions, and each of the is quantized to one of two levels, with the minimized average error technique being practiced for each fraction.

REFERENCES:
"Image from computers", M. R. Schroeder, Bell Telephone Laboratories, Inc., IEEE SPECTRUM 1969, pp. 66-78.
"A Survey of Techniques for the Display of Continuous Tone Pictures on Bilevel Displays", J. F. Jarvis et al., Computer Graphics and Image Processing 5, 1976, pp. 13-40.

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