Hardware acceleration of retinal blood vasculature segmentation

Authors:
Dimitris Koukounis;Christos Tttofis;Theocharis Theocharides
Affiliations:
KIOS Research Center, University of Cyprus, Nicosia, Cyprus;KIOS Research Center, University of Cyprus, Nicosia, Cyprus;KIOS Research Center, University of Cyprus, Nicosia, Cyprus
Venue:
Proceedings of the 23rd ACM international conference on Great lakes symposium on VLSI
Year:
2013

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Abstract

Retinal vessel tree extraction is a complex and computationally intensive task used in several medical and biometric applications. The emergence of portable biometric authentication applications, as well as on-site biomedical diagnostics, raises the need for hardware-accelerated, power-efficient architectures that can satisfy the performance and accuracy requirements of retinal vessel tree extraction. As such, this paper presents a VLSI implementation of a retina vessel segmentation system, in an attempt to illustrate the advantages and performance benefits that result from a dedicated VLSI solution. The proposed design implements an unsupervised, vessel segmentation algorithm, which utilizes match filtering with signed integers to enhance the difference between the blood vessels and the rest of the retina. The design simplifies the process of obtaining a binary map of the vessel tree by using parallel processing and efficient resource sharing, thus offering real-time performance. FPGA-based simulation results indicate significant performance improvements (up to 90x) when compared to existing hardware and software implementations.