计算机科学 ›› 2023, Vol. 50 ›› Issue (11A): 220900059-7.doi: 10.11896/jsjkx.220900059
姜灏天1, 王琦智1, 黄扬林1, 章雅琴2, 胡凯1
JIANG Haotian1, WANG Qizhi1, HUANG Yanglin1, ZHANG Yaqin2 andHU Kai1
摘要: 医学影像的灰阶变化小,分割目标与背景不易区分,因此,进行影像分割是充满挑战性的问题。现有网络模型大多将高频的分割边缘与低频的主体部分统一学习,忽视了高频与低频信息的差异性和两者在图像中占比不同的差别。针对这一问题,提出了基于边缘引导的多尺度卷积神经网络Edge Guided V-Shape Network(EGV-Net),从低频分割主体和高频分割边缘两个特征角度进行针对性学习。其中,低频特征通过编码-解码方式进行特征传递,学习分割目标的主体部分;高频特征则通过边缘提取方法,首先将高频语义信息从分割图谱中提取出来,再将分割边缘过滤分离。高频边缘通过边缘引导模块指导模型对低频特征做出精准的分割,并恢复边缘细节精度。在肝脏影像与ISIC2016数据集上进行的实验结果表明,所提算法对整体分割的把控能力更强,在边缘细节处有更好的分割效果,优于其他模型。
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