Image analysis – Histogram processing – For setting a threshold
Patent
1991-01-24
1992-05-19
Razavi, Michael
Image analysis
Histogram processing
For setting a threshold
382 25, 382 41, 2503272, G06K 908
Patent
active
051154765
ABSTRACT:
In an edge finding method and apparatus, from image signal components representing picture elements belonging to a predetermined region in a radiation image of an object, which predetermined region has a predetermined picture element P0 in the middle, calculations are made to find the moment of the image signal components representing the picture elements, which surround the predetermined picture element P0, with respect to a single predetermined direction on the radiation image. Alternatively, calculations are made to find the moments of the image signal components representing the picture elements, which surround the predetermined picture element P0, with respect to two different predetermined directions on the radiation image. A judgment is then made from the moment, which has been calculated with respect to the single predetermined direction, or from the moments, which have been calculated with respect to the two different predetermined directions, as to whether the predetermined picture element P0 belongs or does not belong to part corresponding to an edge in the radiation image.
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Fuji Photo Film Co. , Ltd.
Razavi Michael
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