Abstract
Nuclei segmentation is a fundamental and important task in histopathological image analysis. However, it still has some challenges such as difficulty in segmenting the overlapping or touching nuclei, and limited ability of generalization to different organs and tissue types. In this paper, we propose a novel nuclei segmentation approach based on a two-stage learning framework and Deep Layer Aggregation (DLA). We convert the original binary segmentation task into a two-step task by adding nuclei-boundary prediction (3-classes) as an intermediate step. To solve our two-step task, we design a two-stage learning framework by stacking two U-Nets. The first stage estimates nuclei and their coarse boundaries while the second stage outputs the final fine-grained segmentation map. Furthermore, we also extend the U-Nets with DLA by iteratively merging features across different levels. We evaluate our proposed method on two public diverse nuclei datasets. The experimental results show that our proposed approach outperforms many standard segmentation architectures and recently proposed nuclei segmentation methods, and can be easily generalized across different cell types in various organs.
Keywords
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Kang, Q., Lao, Q., Fevens, T. (2019). Nuclei Segmentation in Histopathological Images Using Two-Stage Learning. In: Shen, D., et al. Medical Image Computing and Computer Assisted Intervention – MICCAI 2019. MICCAI 2019. Lecture Notes in Computer Science(), vol 11764. Springer, Cham. https://doi.org/10.1007/978-3-030-32239-7_78
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DOI: https://doi.org/10.1007/978-3-030-32239-7_78
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