Method for generating radiation image signals

Details Method for generating radiation image signals Method for generating radiation image signals

1989-09-15

1991-04-09

Howell, Janice A.

Radiant energy

Automatic/serial detection of similar sources

382 31, G01N 2304, G03B 4202

Patent

active

050067087

ABSTRACT:
A radiation image which has been recorded on a recording medium is read out at predetermined sampling intervals in order to obtain an image signal. A method for generating a radiation image signal comprises the steps of, in the course of the radiation image being read out, first applying sampling intervals corresponding to a second spatial frequency fsw higher than a first spatial frequency fss, which is the maximum of a desired spatial frequency range, along at least one direction on the recording medium in order to obtain an original image signal. The original image signal is then subjected to filtering processing in order to transmit spatial frequency components below the first spatial frequency fss, and to reduce or eliminate spatial frequency components above the first spatial frequency fss. Lastly, the original image signal which has been obtained from the filtering processing is sampled at sampling intervals corresponding to the first spatial frequency fss in order to obtain an image signal.

REFERENCES:
patent: 4258264 (1981-03-01), Kotera et al.
patent: 4276473 (1981-06-01), Kato et al.
patent: 4282511 (1981-08-01), Southgate et al.
patent: 4315318 (1982-02-01), Kato et al.
patent: 4387428 (1983-06-01), Ishida et al.
patent: 4801795 (1989-01-01), Wilwerding

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