Title :
Optic disk and cup boundary detection using regional information
Author :
Joshi, Gopal Datt ; Sivaswamy, Jayanthi ; Karan, Kundan ; Krishnadas, S.R.
Author_Institution :
CVIT, IIIT Hyderabad, Hyderabad, India
Abstract :
The shape deformation within the optic disk (OD) is an important indicator for the detection of glaucoma. In this paper, relevant disk parameters are estimated using the OD and cup boundaries. A deformable model guided by regional statistics is used to detect the OD boundary. A cup boundary detection scheme is presented based on the appearance of pallor in Lab colour space and the expected cup symmetry. The proposed scheme is tested on 170 images comprising 40 normal and 130 glaucomatous images. The proposed method gives a mean error 0.030 for normal and 0.121 for glaucomatous images in the estimation of cup-to-disk ratio which compares well with reported figures in literature.
Keywords :
biomechanics; deformation; diseases; edge detection; eye; image colour analysis; image segmentation; medical image processing; optical tomography; Lab colour space; boundary detection; glaucoma; optic cup; optic disk; optical coherence tomography; pallor appearance; regional statistics; segmentation; shape deformation; Biomedical imaging; Blood vessels; Deformable models; Optical imaging; Parameter estimation; Retina; Robustness; Shape; Statistics; Testing; CDR ratio; Cup; Glaucoma; Optic Disk; Retinal image;
Conference_Titel :
Biomedical Imaging: From Nano to Macro, 2010 IEEE International Symposium on
Conference_Location :
Rotterdam
Print_ISBN :
978-1-4244-4125-9
Electronic_ISBN :
1945-7928
DOI :
10.1109/ISBI.2010.5490144