Method and system for determining the position of an optic cup boundary
AssigneesSingapore Health Services Pte Ltd, Agency for Science, Technology and Research, National University of Singapore
InventorsWing Kee Damon Wong, Jiang Liu, Joo Hwee Lim, Huiqi Li, Ngan Meng Tan, Tien Yin Wong
Life of this patent
Estimating the term…
Abstract
A method for determining the position of an optic cup boundary in a 2D retinal image. The method includes detecting kinks in blood vessels at an estimated boundary of the optic cup and the optic disc, and determining the position of the optic cup boundary in the 2D retinal image based on the detected kinks. The determined optic cup boundary may be used for determining a CDR which may in turn be used for determining a risk of contracting glaucomatous.
Claims19
A method for determining an optic cup boundary in a 2D retinal image, the method comprising operations of:
- (a) making a preliminary estimate of the position of the optic cup boundary on the image;
- (b) identifying the edges of blood vessels in a neighborhood of the preliminary estimate of the position of the optic cup boundary;
- (c) detecting kinks in the identified blood vessel edges;
- and
- (d) determining the optic cup boundary in the 2D retinal image based on the detected kinks;
- (e) wherein operation (b) comprises:
- (i) generating patches proximate the preliminary estimate of the position of the optic cup boundary;
- and
- (ii) identifying blood vessel edges in each generated patch.
A computer system having a processor and a data storage device, the data storage storing instructions operable by the processor to cause the processor to determine an optic cup boundary in a 2D retinal image by performing the operations of:
- (a) making a preliminary estimate of the position of the optic cup boundary on the image;
- (b) identifying the edges of blood vessels in a neighborhood of the preliminary estimate of the position of the optic cup boundary;
- (c) detecting kinks in the identified blood vessel edges;
- and determining the optic cup boundary in the 2D retinal image based on the detected kinks;
- (d) wherein operation (b) comprises:
- (i) generating patches proximate the preliminary estimate of the position of the optic cup boundary;
- and
- (ii) identifying blood vessel edges in each generated patch.
A non-transitory computer program product, readable by a computer system and containing instructions operable by a processor of the computer system to cause the processor to determine an optic cup boundary in a 2D retinal image by performing the operations of:
- (a) making a preliminary estimate of the position of the optic cup boundary on the image;
- (b) identifying the edges of blood vessels in a neighborhood of the preliminary estimate of the position of the optic cup boundary;
- (c) detecting kinks in the identified blood vessel edges;
- and
- (d) determining the optic cup boundary in the 2D retinal image based on detected kinks;
- (e) wherein operation (b) comprises:
- (i) generating patches proximate the preliminary estimate of the position of the optic cup boundary;
- and
- (ii) identifying blood vessel edges in each generated patch.
Dependencies are inferred from the claim text.