A robust digital method for film contrast correction in subtraction radiography
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چکیده
منابع مشابه
A robust digital method for film contrast correction in subtraction radiography.
Digital subtraction radiography requires close matching of the contrast in the films to be subtracted. A digital melhod is presented permitting the retrospective correction of film contrast differences. The method is nonparanietric and derives the required gray level transformation directly from the histograms associated with the radiographs. This transform is shown to be unique and monotonic. ...
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Subtraction is useful in detecting small changes in sequentially acquired radiographs. Even if the imaging geometry is constant, radiographs must be registered after their digitization. To compare different algorithms for image registration and to register digital X-rays themselves, various similarity measures have been proposed. This study compares eight mathematical similarity standards using...
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ژورنال
عنوان ژورنال: Journal of Periodontal Research
سال: 1986
ISSN: 0022-3484,1600-0765
DOI: 10.1111/j.1600-0765.1986.tb01484.x