Image analysis – Applications – Biomedical applications
Patent
1996-09-16
1999-09-28
Boudreau, Leo H.
Image analysis
Applications
Biomedical applications
382199, 382260, 378160, 378901, G06K 900
Patent
active
059601027
ABSTRACT:
An image processing method is provided to remove areas from an image made by x-irradiation, said areas corresponding to absorption filters in the x-ray beam. Because such filters, also known as x-ray shutters, are inserted into the x-ray beam from the outside of the x-ray beam, x-ray shutter-areas extend from the periphery of the image. Therefore, once the edge of an x-ray shutter-areas has been determined, the part of the image located between the periphery and the x-ray shutter-edge is removed. X-ray shutter-edges are determined by locating transition-points in the image having brightness-transitions having maxima of both the first and second spatial derivatives of the brightness-value. An x-ray shutter-edge is then determined by fitting a curve through the transition-points. The curve fitting is performed with the use of weight-factors that are representative of the likelihood that a transition-point is on an actual x-ray shutter-edge. This likelihood is larger for transition-points which are closer to the periphery of the image, for transition-points having low image roughness towards the periphery of the image. Furthermore, a transition-point having a large height of its brightness-transition is more likely to be on an actual x-ray shutter-edge.
REFERENCES:
patent: 4670896 (1987-06-01), Klausz
patent: 4851984 (1989-07-01), Doi et al.
patent: 4935946 (1990-06-01), Hefter et al.
patent: 5282254 (1994-01-01), Chiu et al.
Breitenstein Jacques
Florent Raoul
Lobregt Steven
Van Eeuwijk Alexander H.W.
Bella Matthew L.
Boudreau Leo H.
Renfrew, Jr. Dwight H.
U.S. Philips Corporation
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