1 research outputs found
Detection of retinal vascular bifurcations by rotation-, scale- and reflection-invariant COSFIRE filters
We propose trainable filters, which we call COSFIRE
(Combination Of Shifted FIlter REsponses), and use to de-
tect vascular bifurcations in retinal images. We configure a
COSFIRE filter to be selective for a bifurcation that is speci-
fied by a user in a single-step training phase. The automatic
configuration comprises the selection of channels of a bank
of Gabor filters and the determination of certain blur and
shift parameters. A COSFIRE filter response is computed
as the geometric mean of the blurred and shifted responses
of the selected Gabor filters. The proposed filters share sim-
ilar properties with some shape-selective neurons in visual
cortex. With only five filters we achieve a recall of 98.57%
at a precision of 95.37% on the 40 binary retinal images
(from DRIVE), containing more than 5000 bifurcations.peer-reviewe