Image gradation processing method and apparatus for radiographic

Details Image gradation processing method and apparatus for radiographic Image gradation processing method and apparatus for radiographic

1979-12-26

1981-12-15

Krass, Errol A.

Boots, shoes, and leggings

250363R, 358166, G01T 120

Patent

active

043062903

ABSTRACT:
A method and apparatus for processing a frontal chest radiograph in a radiographic image copying system in which an original radiograph is scanned with a scanning light beam and the light transmitted through the radiograph is detected by a photodetector which gives an output to be processed and used for recording a visible image on a recording medium. The frontal chest radiograph is gradation processed. The gradation processing is characterized in that the density at the boundary of the heart and the lungs of the image on the recording medium is lowered to lower the contrast of the heart and raise the contrast of the lungs.

REFERENCES:
patent: 3006238 (1961-10-01), Eberline
patent: 3696249 (1972-10-01), Bowker
patent: 3936598 (1976-02-01), Newitt
Sutton et al., "Texture Measures for Automatic Classification of Pulmonary Disease", IEEE Trans. on Computers, vol. 6-21, No. 7, Jul. 1972.

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