针对地震后快速损毁检测,提出新数据集与多尺度交互网络。
Building Change Detection in Earthquake: A Multi-Scale Interaction Network and A Change Detection Dataset

- 设计多尺度特征交互网络,融合跨时相影像信息
- 在土耳其地震数据集上实现优于现有方法的损毁检测精度
- 适合应急救援、遥感监测等需要快速评估的场景
地震是全球范围内破坏性强的自然灾害之一,近年来造成严重经济损失。变化检测(CD)可基于多时相遥感图像推断震后建筑损毁区域,尤其短时间间隔的影像更有利于应急救援。然而,现有深度学习方法能力受限,因缺乏短时距影像数据集。为满足灾后即时救援需求,本文构建了土耳其地震变化检测数据集(TUE-CD),用于短期震后建筑损毁评估。由于震后图像获取时间间隔短,成像角度差异导致侧视问题。为此,提出多尺度特征交互网络(MSI-Net),包含联合交叉注意力(JCA)、多尺度偏移校准(MOC)和特征融合(FeI)模块。JCA模块统一通道交叉注意力与空间联合注意力,实现充分特征交互;MOC模块估计偏移量,对齐双时相图像与多尺度特征;最后通过FeI模块融合校准后特征与多尺度特征,预测变化区域。在WHU-CD、CLCD及自建的TUE-CD数据集上的实验表明,所提MSI-Net优于当前主流变化检测方法。
原文摘要 · Abstract (English)
As one of the most destructive natural disasters, earthquakes have struck many countries around the world in recent years, causing serious economic losses. Change detection (CD) can be applied to post-earthquake damage assessment as it can infer destroyed change regions from multi-temporal remote sensing images. Furthermore, the CD with short imaging interval will better satisfy the needs of the emergency rescues after earthquakes. However, the capability of current methods built on deep neural networks is limited because the dataset with short imaging interval is absent. To meet post-disaster immediate relief, we create a CD dataset, Turkey earthquake CD dataset (TUE-CD), for the evaluation of building damage in the short term after an earthquake. Because of the short acquisition interval of the post-event images, the imaging angle is different for different temporal images, which leads to some side-looking problems. To deal with these challenges, we present a multi-scale feature interaction network (MSI-Net) for efficient interaction between bi-temporal features, as well as mitigating the effect of side-looking problems. Specifically, the proposed MSI-Net consists of joint cross-attention (JCA) modules, multi-scale offset calibration (MOC) modules, and feature integration (FeI) modules. The JCA module unifies channel cross-attention and spatial joint attention for sufficient feature interaction. The MOC module further estimates the offsets to align the bi-temporal image with the multi-scale features. Finally, calibrated features and multi-scale features are fused by FeI modules for the prediction of changed areas. Experiments on the WHU-CD, CLCD, and the constructed TUE-CD dataset indicate that the proposed MSI-Net provides better results than considered state-of-the-art CD methods.
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