计算机科学 ›› 2024, Vol. 51 ›› Issue (5): 100-107.doi: 10.11896/jsjkx.230400114
单昕昕, 李凯, 文颖
SHAN Xinxin, LI Kai, WEN Ying
摘要: 深度学习中的编解码网络在图像特征提取和分层特征融合方面具有卓越的性能,常被用于医学图像分割。但是,目前主流的编解码网络分割方法仍面临编码和解码阶段单一网络挖掘的图像特征信息不足,以及仅使用简单的跳跃连接而无法充分利用全尺度特征包含的粗粒度信息和细粒度信息等问题。为了解决上述问题,提出了一种集成全尺度融合和循环注意力的医学图像分割网络。首先,在U-Net编码器中加入了结合多层感知机(MLP)的卷积MLP模块来提取图像的全局特征信息,用于扩大编码器的特征感受野。其次,通过全尺度特征融合模块使得各尺度跳跃连接特征进行粗粒度信息和细粒度信息的有效融合,减小各尺度跳跃连接特征间的语义差异,突出图像的关键特征信息。最后,解码器通过提出的结合循环神经网络(RNN)和注意力机制的循环注意力解码模块(RADU)来逐级精细化图像特征信息,加强特征提取的同时避免信息冗余,并得到高精度分割结果。在4个数据集上将所提方法与主流较优的方法进行比较,所提方法在像素精度和骰子相似系数两个指标上的图像分割精度均有提高。因此,所提出的用于医学图像分割的编解码网络利用全尺度特征融合模块和循环注意力解码模块,能够获得较优异的高精度分割结果,并且模型具有良好的噪声鲁棒性和抗干扰能力。
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