Image analysis – Histogram processing
Reexamination Certificate
2008-01-22
2008-01-22
Bella, Matthew C. (Department: 2624)
Image analysis
Histogram processing
C382S240000, C382S226000, C382S254000, C382S260000, C382S274000, C375S240000, C375S240010, C375S240180, C375S240190, C341S079000
Reexamination Certificate
active
07321686
ABSTRACT:
Processing for improving the contrast of an image of interest is executed by an image processing circuit in an X-ray photography apparatus. The image is decomposed into coefficient values of a plurality of frequency bands by a frequency-component decomposition circuit to obtain coefficients of each and every frequency band. A coefficient conversion circuit converts coefficient values with regard to at least one frequency band of the plurality of frequency bands in such a manner that a frequency distribution of coefficient values of every frequency band will become a prescribed frequency distribution. A restoration circuit generates an image using the coefficient values obtained by the conversion performed by the coefficient conversion circuit.
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Shibata Hiroyuki
Takahashi Naoto
Tsuchiya Keiji
Bayat Ali
Bella Matthew C.
Canon Kabushiki Kaisha
Morgan & Finnegan L.L.P.
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