PROBLEM TO BE SOLVED: To provide an image processing apparatus and an image processing method which allow a user to quantitatively recognize the structure of a vitreous body in a tomographic image obtained by OCT.SOLUTION: The image processing apparatus includes acquisition means for acquiring a tomographic image of at least a retina and a vitreous body of a subjects eye detection means for detecting, on the basis of the luminance value of the tomographic image, an outer edge (boundary) of the vitreous body in a region located on a vitreous body side of a region regarding the retina in the tomographic image and calculation means for calculating a value relating to a region regulated by the outer edge of the vitreous body and the cortical layer of the retina.SELECTED DRAWING: Figure 5COPYRIGHT: (C)2018,JPO&INPIT【課題】ユーザがOCTにより得られた断層画像における硝子体の構造を、定量的に認識可能とする画像処理装置及び画像処理方法を提供する。【解決手段】画像処理装置は、被検眼の網膜および硝子体を含む断層画像を取得する取得手段と、断層画像における網膜に関する領域よりも硝子体側の領域内の硝子体の外縁(境界)を断層画像の輝度値に基づいて検出する検出手段と、前記硝子体の外縁と網膜の表層とで規定される領域に関する値を算出する算出手段と、を有する。【選択図】図5