Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1982-10-19
1985-06-04
Britton, Howard W.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358284, H04N 138
Patent
active
045218129
ABSTRACT:
This invention relates to a method for improving contrast accentuation in the case of the re-recording of originals in the sphere of electronic image processing by means of graving devices and scanners. An image signal is obtained by scanning an original opto-electronically dot-by-dot and line-by-line, and at least one surround signal is obtained by evaluating the surrounding area of the image dots. A correction signal which is superimposed on the image signal for the purpose of contrast accentuation is derived from the surround signal and the image signal. The original is thereupon re-recorded on a recording medium to an optional reproduction scale. The magnitude of contrast accentuation on the recording medium is adjusted by varying the width of overlap of the image signal and correction signal irrespective of the actual reproduction scale, In the case of enlargements in particular, troublesome border patterns on outlines are averted or at least reduced in such degree that they are no longer noticeable to the beholder.
REFERENCES:
patent: 2691696 (1954-10-01), Yule
patent: 2962548 (1960-11-01), Taudt
patent: 4335407 (1982-06-01), Atoji
patent: 4403258 (1983-09-01), Balzan
patent: 4417281 (1983-11-01), Hama
patent: 4437122 (1984-03-01), Walsh
Britton Howard W.
Dr.-Ing. Rudolf Hell GmbH
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