Journal
2021 IEEE 18TH INTERNATIONAL SYMPOSIUM ON BIOMEDICAL IMAGING (ISBI)
Volume -, Issue -, Pages 1319-1323Publisher
IEEE
DOI: 10.1109/ISBI48211.2021.9433813
Keywords
Retinal vessel segmentation; Context guide; Attention mechanism; Hard sample mining
Funding
- National Key R&D Program of China [2020YFC2008500]
- National Natural Science Foundation of China [61972459, 61971418, 62071157]
- Open Research Fund of Key Laboratory of Space Utilization, Chinese Academy of Sciences [LSU-KFJJ-2020-04]
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The proposed Context Guided Attention Module (CGAM) leverages surrounding context information and spatial attention to improve segmentation accuracy, while the Joint hard sample mining strategy (JHSM) addresses the issue of retinal vessel pixel imbalance. Experimental results on the publicly available DRIVE and CHASE_DB 1 datasets show that our model outperforms state-of-the-art methods.
Retinal vessel segmentation is of great significance for clinical diagnosis of eye-related diseases and diabetic retinopathy. However, due to the imbalance of retinal vessel thickness distribution and the existence of a large number of capillaries, it is difficult to segment the retinal vessels correctly. To better solve this problem, we propose a novel Context Guided Attention Net (CGA-Net) with Joint hard sample mining strategy. Specifically, we propose a Context Guided Attention Module (CGAM) which can utilize both the surrounding context information and spatial attention information to promote the precision of segmentation results. As the CGAM is flexible and lightweight, it can be easily integrated into CNN architecture. To solve the problem of retinal vessel pixel imbalance, we further propose a novel Joint hard sample mining strategy (JHSM) in network training, which combines both the pixel-wise and patch-wise hard mining to largely improve the network's robustness for hard samples. Experiments on publicly DRIVE and CHASE_DB 1 datasets show that our model outperforms state-of-the-art methods.
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