Patent ID: 11887299
Assignee: NATIONAL TAIWAN UNIVERSITY HOSPITAL
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 19:
20. The image processing method as claimed in claim 11, further comprising:
selecting the thickest blood vessel image in the blood vessel segmentation image to determine the long axis of the optic disc image;
selecting the next thickest blood vessel image perpendicular to the long axis to determine the short axis of the optic disc image;
wherein the long axis of an optic cup image is parallel to the long axis of the optic disc image, and the short axis of an optic cup image is parallel to the short axis of the optic disc image;
using an ellipse fitting algorithm to crop the optic disc image according to the long axis of the optic disc image and the short axis of the optic disc image; and
using the ellipse fitting algorithm to crop the optic cup image according to the long axis of the optic cup image and the short axis of the optic cup image.