Abstract: An image processing method, performed by a processor, includes: a step of acquiring OCT volume data including a choroid; a step of generating plural en-face images corresponding to plural planes having different depths, based on the OCT volume data; a step of deriving an image feature amount in each of the plural en-face images; and a step of identifying, as a boundary, an interval between en-face images in which the image feature amounts indicate a switch between presence and absence of choroidal blood vessels, based on the respective image feature amounts.

Abstract: An image processing method performed by a processor includes: a step of acquiring an image captured of a choroid; a step of performing enhancement processing that enhances contrast in the acquired image; a step of performing binarization processing on the image that has been subjected to the enhancement processing; and a step of extracting a region corresponding to choroidal blood vessels in the choroid from the image that has been subjected to the binarization processing.

Abstract: Generating a three-dimensional image of a vortex vein based on OCT volume data. An image processing method is performed by a processor and includes a step of acquiring OCT volume data including a choroid, and a step of extracting choroidal vessels based on the OCT volume data and generating a three-dimensional image of the choroidal vessels.