Density correcting method and apparatus for subtraction image

Details Density correcting method and apparatus for subtraction image Density correcting method and apparatus for subtraction image

1987-11-03

1991-07-02

Berman, Jack I.

Radiant energy

Automatic/serial detection of similar sources

2504841, G01N 2304

Patent

active

050287818

ABSTRACT:
In an energy subtraction processing for radiation images conducted by use of stimulable phosphor sheets, a characteristic value of a difference signal obtained by a subtraction processing of digital image signals detected from the stimulable phosphor sheets carrying radiation images stored therein is calculated. When the difference signal is subjected to a gradation processing, the characteristic value is made to correspond to a predetermined density of a reproduced image by uniformly converting the difference signal or by correcting a gradation conversion table used for the gradation processing.

REFERENCES:
patent: 4258264 (1981-03-01), Kotera et al.
patent: 4302672 (1981-11-01), Kato et al.
patent: 4346406 (1982-08-01), Kato et al.
patent: 4368384 (1983-01-01), Kato et al.
patent: 4564861 (1986-01-01), Hishinuma et al.

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