| 摘要 |
Distribution data is generated by a distribution data generation portion 1802, a second range is specified by a specifying portion 1803, the second range is mapped to a first range by a mapping portion 1804, and third image data is generated by performing binarization based on a threshold value regulated in the first range r 1 by components 1805 to 1812, accordingly, binarization can be suitably performed even in the case where distribution data d 1 of pixel values differs for each subject h.
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