Automated Blood Vessel Segmentation of Fundus Images Based on Region Features and Hierarchical Growth Algorithm

نویسندگان

  • Zhun Fan
  • Jiewei Lu
  • Wenji Li
چکیده

Automated blood vessel segmentation plays an important role in the diagnosis and treatment of various cardiovascular and ophthalmologic diseases. In this paper, a novel unsupervised segmentation algorithm is proposed to extract blood vessels from fundus images. At first, an enhanced vessel image is generated by morphological reconstruction, and then divided into three parts: preliminary vessel regions, background regions and undetermined regions. Secondly, a list of region features of blood vessels are defined and used to remove the noise regions in preliminary vessel regions and extract the skeletons of blood vessels. An intermediate vessel image is obtained by combing the denoised preliminary vessel regions with vessel skeletons. After that, a novel hierarchical growth algorithm, namely HGA, is proposed to label each pixel in undetermined regions as vessel or not in an incremental way, which takes the advantage of color and spatial information from the intermediate vessel image and background regions. Finally, postprocessing is performed to remove the nonvessel regions. The proposed algorithm has low computational complexity and outperforms many other state-ofart supervised and unsupervised methods in terms of accuracy. It achieves a vessel segmentation accuracy of 96.0%, 95.8% and 95.1% in an average time of 10.72s, 15.74s and 50.71s on images from three publicly available retinal image datasets DRIVE, STARE, and CHASE DB1, respectively.

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عنوان ژورنال:
  • CoRR

دوره abs/1701.00892  شماره 

صفحات  -

تاریخ انتشار 2017