Bulletin of Surveying and Mapping ›› 2022, Vol. 0 ›› Issue (5): 74-78,88.doi: 10.13474/j.cnki.11-2246.2022.0144

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Rural road crack segmentation method in complex scene

ZHANG Jinhe1,2, QIN Yuluo1,2,3, ZHANG Zaiyan1,2,4, SONG Weidong1,2, ZHU Hongbo1,2   

  1. 1. School of Geomatics, Liaoning Technical University, Fuxin 123000, China;
    2. Institute of Spatiotemporal Transportation Data, Fuxin 123000, China;
    3. School of Civil Engineering and Architecture, Suqian College, Suqian 223800, China;
    4. School of Mining Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
  • Received:2021-03-22 Revised:2021-05-19 Published:2022-06-08

Abstract: Aiming at the problems of small number of training samples, single scene and inaccurate extraction results in rural road crack identification,based on the measured road image data of Liaoning province for many years,this paper constructs a pavement crack datasets (PCDs) with multiple types and scenes,using ResNet50 network as encoder and SegNet as decoder,a pavement crack image recognition network Res-SegNet is constructed,by increasing the size of the convolution kernel to obtain more abundant crack information,the Focal Loss function is used to makes the model more focused on difficult samples.The block prediction method is used to improve the proportion of fractures in the image and make the image prediction more precise.The network model and prediction method are compared:The test set of PCDs is identified by Res-SegNet in different scenes, the average F value is 0.691,Res-SegNet combined with block prediction is used to identify the test set of PCDs,and the average F value is 0.753 in different scenarios.

Key words: crack detection, deep learning, dataset, Res-SegNet model, block prediction

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