Bulletin of Surveying and Mapping ›› 2025, Vol. 0 ›› Issue (6): 97-102.doi: 10.13474/j.cnki.11-2246.2025.0617

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An integrated edge-gated and multi-scale spatial attention model for drainage pipeline defect segmentation

CHEN Dengfeng1, ZHAO Hanghui1, LIU Shipeng2, MENG Tunliang3, WANG Zepeng1   

  1. 1. School of Building Services Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
    2. School of Mechanical and Electrical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;
    3. Xi'an Construction Technology University Engineering Technology Co., Ltd., Xi'an 710055, China
  • Received:2024-11-22 Published:2025-07-04

Abstract: The aging of urban underground drainage pipelines has led to frequent occurrences of pipe damage, blockages, and other issues. Manual inspection methods struggle to meet the growing demand for detection, while existing intelligent detection technologies still have room for improvement in achieving higher intersection over union(IoU)when addressing irregularly shaped defects and intricate boundaries. This study proposes a semantic segmentation model for drainage pipelines named PGGNet to enhance defect boundary recognition performance. The gated edge attention model(GEA) in PGGNet integrates edge features through the Laplacian edge detection algorithm, significantly improving the ability to capture defect boundaries. Meanwhile, the multi-scale guided spatial attention-state space model(MGSA-SSM)combines a state-space model with MGSA of multi-scale mechanisms to guide the model in capturing both global contours and local details of defects across different scales, thereby enhancing the recognition capability for complex boundaries. Experimental results demonstrate that PGGNet outperforms mainstream algorithms, achieving an mPA of 94.32% and an mIoU of 93.08%, which meets the requirements for automated defect detection in drainage pipelines.

Key words: urban underground drainage pipelines, defect detection, PGGNet, gated mechanism, multi-scale guided spatial attention model

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