Landslides Information Extraction Using Object-Oriented Image Analysis Paradigm Based on Deep Learning and Transfer Learning

Remote Sensing

Min Tang¹  Xiao Fu²  Lei Ma³  Chao Liu⁴  Heng Lu⁴  Zhi Wang⁴  Naiwen Li⁴ 

[1] China Railway Eryuan Engineering Group Co., Ltd., Chengdu 610031, China;Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China;School of Geography and Ocean Science, Nanjing University, Nanjing 210093, China;State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China;

关键词: landslides information extraction;    unmanned aerial vehicle imagery;    convolutional neural network;    transfer learning;    object-oriented image analysis;   

DOI  :  10.3390/rs12050752

来源: DOAJ

【 摘 要 】

How to acquire landslide disaster information quickly and accurately has become the focus and difficulty of disaster prevention and relief by remote sensing. Landslide disasters are generally featured by sudden occurrence, proposing high demand for emergency data acquisition. The low-altitude Unmanned Aerial Vehicle (UAV) remote sensing technology is widely applied to acquire landslide disaster data, due to its convenience, high efficiency, and ability to fly at low altitude under cloud. However, the spectrum information of UAV images is generally deficient and manual interpretation is difficult for meeting the need of quick acquisition of emergency data. Based on this, UAV images of high-occurrence areas of landslide disaster in Wenchuan County and Baoxing County in Sichuan Province, China were selected for research in the paper. Firstly, the acquired UAV images were pre-processed to generate orthoimages. Subsequently, multi-resolution segmentation was carried out to obtain image objects, and the barycenter of each object was calculated to generate a landslide sample database (including positive and negative samples) for deep learning. Next, four landslide feature models of deep learning and transfer learning, namely Histograms of Oriented Gradients (HOG), Bag of Visual Word (BOVW), Convolutional Neural Network (CNN), and Transfer Learning (TL) were compared, and it was found that the TL model possesses the best feature extraction effect, so a landslide extraction method based on the TL model and object-oriented image analysis (TLOEL) was proposed; finally, the TLOEL method was compared with the object-oriented nearest neighbor classification (NNC) method. The research results show that the accuracy of the TLOEL method is higher than the NNC method, which can not only achieve the edge extraction of large landslides, but also detect and extract middle and small landslides accurately that are scatteredly distributed.

【 授权许可】

Unknown