PROBLEM TO BE SOLVED: To efficiently and accurately extract oblique fissures of lung from a three-dimensional image of the lung area.SOLUTION: An image processing device is configured to: extract pixels of which maximum principal curvatures are equal to or more than a predetermined value, from a three-dimensional image extract planar areas composed of the plurality of continuous pixels of which angle differences of direction vectors of the maximum principal curvatures are less than a first angle, among the extracted pixels and assign first identification information to respective planar areas according to the direction vectors of maximum principal curvatures of the pixels.COPYRIGHT: (C)2014,JPO&INPIT【課題】肺野領域の3次元画像から葉間裂を効率よく正確に抽出する。【解決手段】3次元画像から最大主曲率が所定値以上である画素を抽出する。抽出された画素のうち、最大主曲率方向ベクトルの角度差が第1の角度未満である連続する複数の画素により構成される面状領域を抽出し、面状領域毎に画素の最大主曲率方向ベクトルに応じた第1識別情報を付与する。【選択図】図1
