TY - JOUR 
A1 - Morales Martínez, Sandra
AU - Legaz Aparicio, Alvar Ginés
AU - Naranjo Ornedo, Valeriana
AU - Verdú Monedero, Rafael
T1 - Determination of bifurcation angles of the retinal vascular tree through multiple orientation estimation based on regularized morphological openings
Y1 - 2015
UR - http://hdl.handle.net/10317/8335
AB - This paper describes a new approach to compute bifurcation angles in retinal images. This approach is based on the estimation of multiple orientations at each pixel of a gray retinal image. The main orientations are provided by directional openings whose outputs are regularized in order to extend the orientation information to the whole image. The detection of vessel bifurcations is based on the coexistence of two or more than two different main orientations at the same pixel. Once the bifurcations and crossovers has been identified, bifurcation angles are calculated. The proposed procedure of computing bifurcation angles by means of orientation estimation at all pixels of the gray level image is much more stable than those methods which are based on the skeleton of the vascular tree, since a slight variation of a pixel of the skeleton can produce a significant change in the angle value
KW - Teoría de la Señal y las Comunicaciones
KW - Retinal image
KW - Bifurcation angle
KW - Multiple orientation estimation
KW - Regularized morphological opening
KW - 2209.90 Tratamiento Digital. Imágenes
LA - eng
PB - SCITEPRESS (Science and Technology Publications, Lda)
ER -