Radiographic image processing method wherein small variation of

Details Radiographic image processing method wherein small variation of Radiographic image processing method wherein small variation of

1992-03-20

1994-11-29

Envall, Jr., Roy N.

Boots, shoes, and leggings

36441314, 36441315, 36441317, 36441318, 36441323, 382 54, 382 6, 348571, G06F 1568

Patent

active

053695720

ABSTRACT:
A method for processing a radiographic image, containing: a step for calculating an average S.sub.m of original image data of an averaging area around each pixel of the radiographic image; and a step for transforming the original image data S of each pixel of the radiographic image to obtain a processed image data Q of each pixel in accordance with an equation, Q=S+.function.(S-S.sub.m), where .function.(S-S.sub.m) has a characteristic in at least one of first and second ranges of the difference S-S.sub.m, the difference S-S.sub.m is positive in the first range and negative in the second range, and according to the above characteristic, the absolute value .vertline.Q-S.vertline. varies in accordance with an increasing monotonic function of the absolute value .vertline.S-S.sub.m .vertline. when the absolute value .vertline.S-S.sub.m .vertline. is less than a predetermined value, and the absolute value .vertline.Q-S.vertline. varies in accordance with a decreasing monotonic function of the absolute value .vertline.S-S.sub.m .vertline. when the absolute value .vertline.S-S.sub.m .vertline. of the difference S-S.sub.m is more than the predetermined value. The above function .function.(S-S.sub.m) may be a non-odd function of the difference S-S.sub.m.

REFERENCES:
patent: 4231065 (1980-10-01), Fitch et al.
patent: 4760460 (1988-07-01), Shimotohno
patent: 4789933 (1988-12-01), Chen et al.
patent: 4794531 (1988-12-01), Morishita et al.
patent: 4839726 (1989-06-01), Balopole et al.
patent: 5136372 (1992-08-01), Nakatani et al.

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