Method of a device for generating differential images

Details Method of a device for generating differential images Method of a device for generating differential images

1982-08-26

1985-01-01

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358174, 364414, 378 99, H04N 718

Patent

active

044918666

ABSTRACT:
The invention relates to a method of and a device for generating differential images in which the effect of fluctuations of the X-ray pulse or the gain of the images intensifier/image pick-up tube network on the differential image is eliminated. To this end, the peak value is determined for each X-ray image in order to be stored in a fixed location in a memory. The difference between the logarithms of the peak values is added to the differential image, so that said fluctuations are compensated for.

REFERENCES:
patent: 4367490 (1983-01-01), Riederer
patent: 4375068 (1983-02-01), McBride
patent: 4393402 (1983-07-01), Keyes

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