Holistically-Nested Structure-Aware Graph Neural Network for Road Extraction

• URL: http://arxiv.org/abs/2407.02639v2
• Date: Mon, 8 Jul 2024 12:42:02 GMT
• Title: Holistically-Nested Structure-Aware Graph Neural Network for Road Extraction
• Authors: Tinghuai Wang, Guangming Wang, Kuan Eeik Tan,
• Abstract summary: This paper presents a novel graph neural network (GNN) which simultaneously detects both road regions and road borders. Experiments on challenging dataset demonstrate that the proposed architecture can improve the road border delineation and road extraction accuracy.
• Score: 6.537257686406911
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Convolutional neural networks (CNN) have made significant advances in detecting roads from satellite images. However, existing CNN approaches are generally repurposed semantic segmentation architectures and suffer from the poor delineation of long and curved regions. Lack of overall road topology and structure information further deteriorates their performance on challenging remote sensing images. This paper presents a novel multi-task graph neural network (GNN) which simultaneously detects both road regions and road borders; the inter-play between these two tasks unlocks superior performance from two perspectives: (1) the hierarchically detected road borders enable the network to capture and encode holistic road structure to enhance road connectivity (2) identifying the intrinsic correlation of semantic landcover regions mitigates the difficulty in recognizing roads cluttered by regions with similar appearance. Experiments on challenging dataset demonstrate that the proposed architecture can improve the road border delineation and road extraction accuracy compared with the existing methods.

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