Journal of Xidian University ›› 2022, Vol. 49 ›› Issue (1): 236-244.doi: 10.19665/j.issn1001-2400.2022.01.025

• Computer Science and Technology & Artificial Intelligence • Previous Articles    

Boundary-aware network for building extraction from remote sensing images

ZHANG Yan(),WANG Xiangyu(),ZHANG Zhongwei(),SUN Yemei(),LIU Shudong()   

  1. School of Computer and Information Engineering,Tianjin Chengjian University,Tianjin 300384,China
  • Received:2020-12-17 Online:2022-02-20 Published:2022-04-27
  • Contact: Zhongwei ZHANG E-mail:zhangyan@tcu.edu.cn;1196245995@qq.com;gucaszzw@163.com;sunyemei1216@163.com;liushudong@tcu.edu.cn

Abstract:

The complexity of remote sensing images brings a great challenge for building extraction research.The introduction of deep learning improves the accuracy of building extraction from remote sensing images,but there are still some problems such as blurred boundaries,missing targets and incomplete extraction areas.To address these issues,this paper proposes a boundary-aware network for building extraction from remote sensing images,including the feature fusion network,feature enhancement network and feature refinement network.First,the feature fusion network uses the encoding-decoding structure to extract different scale features,and designs the interactive aggregation module to fuse different scale features.Then,the feature enhancement network enhances the learning of missed targets through subtraction and cascade operation to obtain more comprehensive features.Finally,the feature refinement network further refines the output of the feature enhancement network by using the encoding-decoding structure to obtain rich building boundary features.In addition,in order to make the network more stable and effective,this paper combines the binary cross-entropy loss and the structure similarity loss,and supervises the training and learning of the model on both pixel and image structure levels.Through the test on the dataset WHU,in terms of objective metrics,the IoU and Precision of this network are improved compared with other classical algorithms,reaching 96.0% and 97.9% respectively.At the same time,in terms of subjective vision,the extracted building boundary is clearer and the region is more complete.

Key words: building extraction, boundary aware, encoding-decoding, remote sensing image, deep learning

CLC Number: 

  • TP391