Patent ID: 7639857
Filing Date: 2009-12-29
Classification: G06T

Abstract:
1. An imaging apparatus which outputs, to an external device, image data obtained by an imaging unit to radiograph a subject by using radiation, comprising: first storage means for storing radiation image data obtained by the imaging unit in a radiation irradiation state; second storage means for storing reference image data obtained by the imaging unit in a radiation non-irradiation state; reduction means for generating reduced radiation image data and reduced reference image data as reduced image data of the radiation image data and the reference image data; execution means for executing offset correction processing between the radiation image data and the reference image data; and output means for, after output of the reduced radiation image data and the reduced reference image data to the external device is ended, outputting offset-corrected radiation image data obtained by said execution means to the external device, wherein said reduction means generates the reduced image data by extracting, from all pixels obtained by the imaging unit, at least one of pixel groups located on two pairs of diagonals of an n×n pixel (where n is a natural number) square region of the imaging unit, and wherein the value n is determined on the basis of at least one of necessary size and image quality of the reduced image data, a time allowable for output to the external device, a pixel pitch of the imaging unit, and a grid pitch of an X-ray antiscatter grid.