Radiant energy – Automatic/serial detection of similar sources
Patent
1987-11-25
1990-11-13
Howell, Janice A.
Radiant energy
Automatic/serial detection of similar sources
2504841, G01N 2304
Patent
active
049703935
ABSTRACT:
In a method of recognizing an irradiation field, image signals at their respective positions on a recording medium carrying a radiation image stored thereon are detected from image information obtained by image read-out. A difference image constituted by difference values between the image signals is created and scanned in one direction to detect sections each intercepted between a difference value not smaller than a threshold value +Th and a difference value not larger than -Th on each scanning line. Or, the difference image is scanned in two or more directions to detect ranges each comprising a group of the intercepted sections on the scanning lines in each of the scanning directions. The total of the sections or a region formed based on the ranges is the irradiation field. In a method of adjusting the image processing conditions, the image processing conditions are adjusted based on the image information inside of the recognized irradiation field.
REFERENCES:
patent: 4258264 (1981-03-01), Kotera et al.
patent: 4527060 (1985-07-01), Suzuki et al.
patent: 4682028 (1987-07-01), Tanaka et al.
Young et al., Handbook of Pattern Recogn. and Image Process, Academic Press (1986) p. 193.
Fuji Photo Film Co. , Ltd.
Hanig Richard
Howell Janice A.
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