X-ray or gamma ray systems or devices – Specific application – Absorption
Patent
1998-06-29
2000-09-12
Bruce, David V.
X-ray or gamma ray systems or devices
Specific application
Absorption
378207, G01N 2304
Patent
active
06118845&
ABSTRACT:
Image processing operations are used to improve images that include visual artifacts generated by calibration markers used in intrinsic calibration of an x-ray image. Artifacts introduced by opaque or semi-transparent calibration markers may be completely or partially removed from the image. More particularly, artifacts caused by opaque calibration markers are removed by changing the pixels corresponding to the projections of the calibration markers to blend in with pixels surrounding the calibration markers. Artifacts may also be generated with semi-transparent calibration markers. These artifacts may be eliminated from the image, while leaving intact the underlying image, by subtracting a constant offset from each marker projection.
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