| 摘要 |
PROBLEM TO BE SOLVED: To accurately and automatically measure the arterio/venous diameter ratio of eye-ground images, to save the manpower of diagnoses of a doctor, to provide many objective measurement data and to effectively utilize them. SOLUTION: The eye-ground images are inputted (102) and an optic nerve papillary part and the center C are measured (103). Plural areas Rn surrounded by the two concentric circles of radii rn and rn+1 with the C as the center are set (104). Blood vessels are extracted (105) inside the respective areas, a blood vessel pair without crossing or branching is selected (106), a distance between the blood vessels is obtained by performing scanning non the circumference of the radius rn (107), the two of the short distance are selected as the blood vessel pair (108), the blood vessel diameter and luminance value are measured and the arterioorvenous ins judged (109). The judged result of the arteriovenous is corrected by the continuity of the blood vessels between the areas (110), an arteriovenous pair is decided by measuring the blood vessel diameter and luminance value of the blood vessel pair (111), the arteriovenous diameter ratio is measured and digitized (112) and it is stored and preserved along with input images and patient information, etc., (111). |
