Image gradation processing method and apparatus for mammogram co

Details Image gradation processing method and apparatus for mammogram co Image gradation processing method and apparatus for mammogram co

1980-02-22

1982-07-20

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358284, 358111, 364414, 250416TV, 250363S, H04N 532

Patent

active

043409113

ABSTRACT:
A method of and apparatus for processing a mammogram in a mammogram copying system in which an original mammogram is scanned with a scanning light beam and the light transmitted through the mammogram is detected by a photodetector which gives an output to be processed and used for recording a visible image on a recording medium. The image gradation of the mammogram is processed. The gradation processing is characterized in that the minimum density of the glandular tissue of the mammogram is lowered down to the level of the fog density to raise the contrast of the mammogram.

REFERENCES:
patent: 3006238 (1961-10-01), Eberline
patent: 3696249 (1972-10-01), Bowker
patent: 3936598 (1976-02-01), Newitt
patent: 4020347 (1977-04-01), Geluk
patent: 4306290 (1981-12-01), Kato et al.

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