Anterior eye three-dimensional image processing apparatus and method of anterior eye three-dimensional image processing

An anterior eye three-dimensional (3D) image processing apparatus configured to process an anterior eye 3D image of a subjected eye acquired by using an optical coherence tomographic image capturing apparatus, the anterior eye 3D image processing apparatus comprising:

• a processor;
• and
• a memory storing computer-readable instructions therein, the computer-readable instructions, when executed by the processor, causing the anterior eye 3D image processing apparatus to perform:
• acquiring a plurality of two-dimensional (2D) tomographic images constituting the anterior eye 3D image;
• identifying first temporary SS positions in each of at least two representative images selected from the plurality of 2D tomographic images, each of the first temporary SS positions indicating a space coordinate position of a scleral spur of the subjected eye;
• calculating a reference circle passing through at least three of the first temporary SS positions in the anterior eye 3D image;
• identifying second temporary SS positions in each of at least one non-representative image by using the calculated reference circle on a presumption that the scleral spur is located on the calculated reference circle, the at least one non-representative image being other than the at least two representative images among the plurality of 2D tomographic images;
• extracting regions in a predetermined range in each of at least one 2D tomographic image selected from the at least two representative images and the at least one non-representative image, in a case where the at least one 2D tomographic image selected from the at least two representative images, each of the regions being centered at a corresponding one of the identified first temporary SS positions, in a case where the at least one 2D tomographic image selected from the at least one non-representative image, each of the regions being centered at a corresponding one of the identified second temporary SS positions;
• identifying at least one of edge lines each of which indicating a tissue boundary that exists in each of the extracted regions;
• and
• correcting the identified first temporary SS positions or the second temporary SS positions based on the identified at least one of the edge lines.