Half-tone image generator using white noise source

Details Half-tone image generator using white noise source Half-tone image generator using white noise source

1989-12-28

1991-04-09

Groody, James J.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358465, 358455, H04N 140

Patent

active

050069381

ABSTRACT:
A half-tone binarization generator that produces high-quality half-tone binarization images by converting multilevel brightness information into sets of black and white bitonal data by adding noise to the multilevel brightness information and using a thresholding technique.

REFERENCES:
patent: 3911212 (1975-10-01), Yoshizawa et al.
patent: 3965290 (1976-06-01), Tisue
patent: 4234895 (1980-11-01), Sommer et al.
patent: 4399461 (1983-08-01), Powell
patent: 4908875 (1990-03-01), Assael et al.
patent: 4912569 (1990-03-01), Petilli
patent: 4918543 (1990-04-01), Petilli

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