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

George Azzopardi*, Nicolai Petkov

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

    Abstract

    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 biters, 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.

    Original languageEnglish
    Title of host publication2012 25TH INTERNATIONAL SYMPOSIUM ON COMPUTER-BASED MEDICAL SYSTEMS (CBMS)
    EditorsP Soda, F Tortorella
    Place of PublicationNEW YORK
    PublisherIEEE (The Institute of Electrical and Electronics Engineers)
    Number of pages4
    ISBN (Print)978-1-4673-2051-1
    Publication statusPublished - 2011
    Event25th International Symposium on Computer-Based Medical Systems (CBMS) - , Italy
    Duration: 20-Jun-201222-Jun-2012

    Other

    Other25th International Symposium on Computer-Based Medical Systems (CBMS)
    Country/TerritoryItaly
    Period20/06/201222/06/2012

    Keywords

    • FEATURES
    • IMAGES

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