Detection of retinal vascular bifurcations by rotation-, scale- and reflection-invariant COSFIRE filters

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We propose trainable filters, which we call COSFIRE (Combination Of Shifted FIlter REsponses), and use to detect vascular bifurcations in retinal images. We configure a COSFIRE filter to be selective for a bifurcation that is specified 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 similar 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.
Originele taal-2English
TitelEPRINTS-BOOK-TITLE
UitgeverijUniversity of Groningen, Johann Bernoulli Institute for Mathematics and Computer Science
Aantal pagina's4
ISBN van elektronische versie9781467320511
ISBN van geprinte versie9781467320498
StatusPublished - 2012

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