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Detection of blood vessels in retinal images using two-dimensional matched filters

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5 Author(s)
Chaudhuri, S. ; Dept. of Electr. Eng., California Univ., San Diego, La Jolla, CA, USA ; Chatterjee, S. ; Katz, N. ; Nelson, M.
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Blood vessels usually have poor local contrast, and the application of existing edge detection algorithms yield results which are not satisfactory. An operator for feature extraction based on the optical and spatial properties of objects to be recognized is introduced. The gray-level profile of the cross section of a blood vessel is approximated by a Gaussian-shaped curve. The concept of matched filter detection of signals is used to detect piecewise linear segments of blood vessels in these images. Twelve different templates that are used to search for vessel segments along all possible directions are constructed. Various issues related to the implementation of these matched filters are discussed. The results are compared to those obtained with other methods

Published in:

Medical Imaging, IEEE Transactions on  (Volume:8 ,  Issue: 3 )

Date of Publication:

Sep 1989

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