一种改进变换网络的域自适应语义分割网络

A Domain Adaptive Semantic Segmentation Network Based on Improved Transformation Network

语义标签的人工标注成本高,耗时长,基于域自适应的非监督语义分割是非常必要的.针对间隙大的场景或像素易限制模型训练、降低语义分割精度的问题,通过分阶段训练和可解释蒙版消除大间隙图片和像素的干扰,提出了一种改进变换网络的域自适应语义分割网络(DA-SSN).首先,针对部分源图到目标图的域间隙大、网络模型训练困难的问题,利用训练损失阈值划分大间隙的源图数据集,提出一种分阶段的变换网络训练策略,在保证小间隙源图的语义对齐基础上,提高了大间隙源图的变换质量.然后,为了进一步缩小源图中部分像素与目标图域间间隙,提出一种可解释蒙版.通过预测每个像素在源图域和目标图域之间的间隙缩小置信度,忽略对应像素的训练损失,以消除大间隙像素对其他像素语义对齐的影响,使得模型训练只关注高置信度像素的域间隙.结果表明,所提算法相比于原始的域自适应语义分割网络的分割精度更高.与其他流行算法的结果相比,所提方法获得了更高质量的语义对齐,表明了所提方法精度高的优势.

Due to the high cost and time-consumption of artificial semantic tags,domain-based adaptive semantics segmentation is very necessary.For scenes with large gaps or pixels,it is easy to limit model training and reduce the accuracy of semantic segmentation.In this paper,a domain adaptive semantic segmentation network(DA-SSN)using the improved transformation network is proposed by eliminating the interference of large gap pictures and pixels through staged training and interpretable masks.First,in view of the problem of large domain gaps from some source graphs to target graphs and the difficulty in network model training,the training loss threshold is used to divide the source graph dataset with large gaps,and a phased transformation network training strategy is proposed.Based on the ensurance of the semantic alignment of small gap source images,the transformation quality of large gap source images is improved.In addition,in order to further reduce the gap between some pixels in the source image and the target image area,an interpretable mask is proposed.By predicting the gap between each pixel in the source image domain and the target image domain,the confidence is reduced,and the training loss of the corresponding pixel is ignored to eliminate the influence of large gap pixels on the semantic alignment of other pixels,so that model training only focuses on the domain gap of high-confidence pixels.The results show that the proposed algorithm has a higher segmentation accuracy than the original domain adaptive semantic segmentation network.Compared with the results of other popular algorithms,the proposed method obtains a higher quality semantic alignment,which shows the advantages of the proposed method with high accuracy.