Abstract
Intracellular organelles such as the endoplasmic reticulum, mitochondria, and the cell nucleus exhibit complex structures and diverse morphologies. These intracellular structures (ICSs) play important roles in serving essential physiological functions of cells. Their accurate segmentation is crucial to many important life sciences and clinical applications. When using deep learning-based segmentation models to extract ICSs in fluorescence microscopy images (FLMIs), we find that U-Net provides superior performance, while other well-designed models such as DeepLabv3+ and SegNet perform poorly. By investigating the relative importance of the features learned by U-Net, we find that low-level features play a dominant role. Therefore, we develop a simple strategy that modifies general-purpose segmentation models by fusing low-level features via a decoder architecture to improve their performance in segmenting ICSs from FLMIs. For a given segmentation model, we first use a group of convolutions at the original image scale as the input layer to obtain low-level features. We then use a decoder to fuse the multi-scale features, which directly passes information of low-level features to the prediction layer. Experimental results on two custom datasets, ER and MITO, and a public dataset NUCLEUS, show that the strategy substantially improves the performance of all the general-purpose models tested in segmentation of ICSs from FLMIs. Data and code of this study are available at https://github.com/cbmi-group/icss-segmentation.
Y. Guo and J. Huang—Equal contributors.
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Acknowledgements
This study was supported in part by NSFC grant 91954201 and grant 31971289, the Strategic Priority Research Program of the Chinese Academy of Sciences grant XDB37040402, the Chinese Academy of Sciences grant 292019000056, the University of Chinese Academy of Sciences grant 115200M001, and the Beijing Municipal Science & Technology Commission grant 5202022.
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Guo, Y., Huang, J., Zhou, Y., Luo, Y., Li, W., Yang, G. (2021). Segmentation of Intracellular Structures in Fluorescence Microscopy Images by Fusing Low-Level Features. In: Ma, H., et al. Pattern Recognition and Computer Vision. PRCV 2021. Lecture Notes in Computer Science(), vol 13021. Springer, Cham. https://doi.org/10.1007/978-3-030-88010-1_32
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