Abstract
Detection of blood vessels in retinal fundus image is the preliminary step to diagnose several retinal diseases. There exist several methods to automatically detect blood vessels from retinal image with the aid of different computational methods. However, all these methods require lengthy processing time. The method proposed here acquires binary vessels from a RGB retinal fundus image in almost real time. Initially, the phase congruency of a retinal image is generated, which is a soft-classification of blood vessels. Phase congruency is a dimensionless quantity that is invariant to changes in image brightness or contrast; hence, it provides an absolute measure of the significance of feature points. This experiment acquires phase congruency of an image using Log-Gabor wavelets. To acquire a binary segmentation, thresholds are applied on the phase congruency image. The process of determining the best threshold value is based on area under the relative operating characteristic (ROC) curve. The proposed method is able to detect blood vessels in a retinal fundus image within 10 s on a PC with (accuracy, area under ROC curve) = (0.91, 0.92), and (0.92, 0.94) for the STARE and the DRIVE databases, respectively.
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Notes
http://www.tomshardware.com/reviews/mother-cpu-charts-2005,1175-39.html provides a chart in which the execution chart of different processors is compared.
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Amin, M.A., Yan, H. High speed detection of retinal blood vessels in fundus image using phase congruency. Soft Comput 15, 1217–1230 (2011). https://doi.org/10.1007/s00500-010-0574-2
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DOI: https://doi.org/10.1007/s00500-010-0574-2