X-ray or gamma ray systems or devices – Specific application – Computerized tomography
Patent
1996-12-23
1998-05-19
Porta, David P.
X-ray or gamma ray systems or devices
Specific application
Computerized tomography
378901, G06K 900
Patent
active
057546185
ABSTRACT:
An image processing apparatus which performs a process which enhances incongruous pixel values in an original image, including an object pixel selecting unit for selecting an object pixel out of pixels which compose the original image, a plurality n of filter units, each of which extracts pixel values of a set of pixels, including the selected object pixel, on one of a predetermined surface and a predetermined line which pass through the object pixel, out of pixels in a predetermined range, wherein each predetermined surface and predetermined line is at a different inclination, a relative size comparing unit for comparing pixels values of each set of pixels extracted by each filter unit and specifying a filter unit whose pixel values best approximate to a predetermined standard, and a first pixel value enhancing unit for enhancing a pixel value of the object pixel based on only the pixel values of the specified filter unit.
REFERENCES:
patent: 4885688 (1989-12-01), Crawford
patent: 4920573 (1990-04-01), Rhodes et al.
patent: 4984159 (1991-01-01), Gullberg
patent: 5283837 (1994-02-01), Wood
Kadota Hiroshi
Mino Yoshiteru
Okamoto Tadashi
Matsushita Electric Industrial
Porta David P.
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