TY - GEN
T1 - Image enhancement methods for a customized videokeratography system designed for animals with small eyes
AU - Chen, Bin
AU - Ling, Shan
AU - Cen, Hongfei
AU - Xu, Wenfu
AU - Chea-Su, Kee
AU - Zhou, Yongjin
AU - Wang, Lei
PY - 2014
Y1 - 2014
N2 - We built a Placido's disc videokeratographic system intended for eye examination of small animals. To derive the corneal topology and other corneal biometric parameters we rely on precise extraction of Placido ring patterns. However, since the images from CCD are noisy, image enhancement is necessary as a pre-processing procedure in order to prevent further noise magnification during the corneal surface topography reconstruction. In this study, two popular image enhancement methods, namely Gabor Filtering (GF) and Multiscale Vessel Enhancement Filtering (MVEF), are quantitatively evaluated in the context of image enhancement before corneal reconstruction. The two methods were tested on 21 images of steel balls with different diameters. Both methods have been demonstrated to be useful for Placido ring extraction; however, the GF method showed better performance on images of steel balls with smaller diameter. Compared to the GF method, the MVEF method performed better on images of steel balls with larger diameter. The result of the present work implies that the two methods should be used cooperatively.
AB - We built a Placido's disc videokeratographic system intended for eye examination of small animals. To derive the corneal topology and other corneal biometric parameters we rely on precise extraction of Placido ring patterns. However, since the images from CCD are noisy, image enhancement is necessary as a pre-processing procedure in order to prevent further noise magnification during the corneal surface topography reconstruction. In this study, two popular image enhancement methods, namely Gabor Filtering (GF) and Multiscale Vessel Enhancement Filtering (MVEF), are quantitatively evaluated in the context of image enhancement before corneal reconstruction. The two methods were tested on 21 images of steel balls with different diameters. Both methods have been demonstrated to be useful for Placido ring extraction; however, the GF method showed better performance on images of steel balls with smaller diameter. Compared to the GF method, the MVEF method performed better on images of steel balls with larger diameter. The result of the present work implies that the two methods should be used cooperatively.
KW - Gabor filtering
KW - Multiscale vessel enhancement filtering
KW - Videokeratography
UR - https://www.scopus.com/pages/publications/84894450929
U2 - 10.1007/978-94-007-7618-0_98
DO - 10.1007/978-94-007-7618-0_98
M3 - 会议稿件
AN - SCOPUS:84894450929
SN - 9789400776173
T3 - Lecture Notes in Electrical Engineering
SP - 1001
EP - 1009
BT - Frontier and Future Development of Information Technology in Medicine and Education, ITME 2013
T2 - 5th International Symposium on IT in Medicine and Education, ITME 2013
Y2 - 19 July 2013 through 21 July 2013
ER -