PROBLEM TO BE SOLVED: To provide an X-ray photographing device in which density level difference can be corrected even in the case that an overlapping area is small.SOLUTION: A density correction part performs density correction on the basis of overlapping areas Pa, Pb and other pixel areas (areas Sa, Sb). By performing density correction by using not only the overlapping areas but also the other areas (areas Sa, Sb), density level difference can be corrected even in the case that the overlapping areas Pa, Pb are small. It is preferable to perform density correction on the basis of an X-ray image (a post image Ppost) where positioning has been performed. Thus, by performing the density correction after positioning, a long image (composite image) in which patterns of pixel values match each other and there is no density level difference even in the case that the overlapping areas are small.COPYRIGHT: (C)2015,JPO&INPIT【課題】重複領域が小さい場合においても濃度段差を補正することができるX線撮影装置を提供する。【解決手段】濃度補正部は、重複領域Pa,Pbおよびそれ以外の画素領域(領域Sa,Sb)に基づいて濃度補正を行う。重複領域のみならず、それ以外の領域(領域Sa,Sb)をも用いて濃度補正を行うことで、重複領域Pa,Pbが小さい場合においても濃度段差を補正することができる。また、位置合わせが行われたX線画像(後画像Ppost)に基づいて、濃度補正を行うのが好ましい。このように位置合わせ後に濃度補正を行うことで、画素値のパターンが互いに一致し、かつ重複領域が小さい場合においても濃度段差のない長尺画像(合成画像)を取得することができる。【選択図】図6
