Method for analyzing a stereoscopic image of a fundus, and an apparatus for executing that method
US6134341A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1997 |
| Grant date | Oct 17, 2000 |
| Priority date | — |
| Expiry date | Dec 3, 2017 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B3/14
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for analyzing a stereoscopic image of a fundus to detect and analyze an optic disk part on the basis of the stereoscopic image of the fundus, which can provide highly reliable results of analysis even if the fundus is inclined. The method includes: a first step of designating a disk line in the stereoscopic image of the fundus; a second step of determining a lowest point in a disk region which is determined by the designated disk line; a third step of determining a cross section of the disk region at each predetermined angle centering on the lowest point; a fourth step of determining highest points at both ends of a line of longitude on each cross section of the disk region; a fifth step of setting as a cup point a level which is lower from the highest points by a predetermined depth; and a sixth step of forming a cup rim by consecutively connecting the cup points in the cross sections of the disk region determined in the fifth step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.