METHOD OF SUPPRESSING PERIODICAL PATTERN IN IMAGE

摘要

PROBLEM TO BE SOLVED: To suppress a periodical pattern generated by existence of a scatter preventing grid in an X-ray image.

SOLUTION: A short-time Goertzel transform is applied to the image signal to transform it into a representation of the spatial frequency component corresponding to the periodic pattern. This representation is processed. Next the inverse of the transformation is computed and the result of the inverse transformation is removed from the image signal.

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