FIELD: information technology.
SUBSTANCE: image processing device has a unit for obtaining images, which receives a plurality of partial images obtained by capturing each from a plurality of capturing ranges into which an object capturing region is divided; a forming unit which forms an image by combining the plurality of partial images obtained by capturing the object; a unit for deriving quantitative values of features, which derives a quantitative value of a feature of one of the partial images; a characteristic deriving unit which derives a gradation conversion processing characteristic based on the quantitative value of the feature and the capturing region; a conversion unit which converts, based on the characteristic, gradation of the image of the object capturing region, obtained by combining partial images; a control unit which controls the forming unit and the characteristic deriving unit, wherein control is performed such that processes of the unit for deriving quantitative values of features and the characteristic deriving unit are performed concurrently with the process of the forming unit.
EFFECT: shorter time required for image formation using radiation to obtain an inverse image with converted gradation.
17 cl, 7 dwg
