数字农科院2.0

Vegetation Classification and Extraction of Urban Green Spaces Within the Fifth Ring Road of Beijing Based on YOLO v8

文献类型： 外文期刊

作者： Li, Bin;Xu, Xiaotian;Duan, Yingrui;Wang, Hongyu;Liu, Xu;Sun, Yuxiao;Zhao, Na;Li, Shaoning;Lu, Shaowei

作者机构：

关键词： urban green spaces;vegetation classification;GF-7;YOLO v8;machine learning

期刊名称： LAND

ISSN：

年卷期： 2025 年 14 卷 10 期

页码：

收录情况： SSCI（2025版）

摘要： Real-time, accurate and detailed monitoring of urban green space is of great significance for constructing the urban ecological environment and maximizing ecological benefits. Although high-resolution remote sensing technology provides rich ground object information, it also makes the surface information of urban green spaces more complex. Existing classification methods often struggle to meet the requirements of classification accuracy and the automation demands of high-resolution images. This study utilized GF-7 remote sensing imagery to construct an urban green space classification method for Beijing. The study used the YOLO v8 model as the framework to conduct a fine classification of urban green spaces within the Fifth Ring Road of Beijing, distinguishing between evergreen trees, deciduous trees, shrubs and grasslands. The aims were to address the limitations of insufficient model fit and coarse-grained classifications in existing studies, and to improve vegetation extraction accuracy for green spaces in northern temperate cities (with Beijing as a typical example). The results show that the overall classification accuracy of the trained YOLO v8 model is 89.60%, which is 25.3% and 28.8% higher than that of traditional machine learning methods such as Maximum Likelihood and Support Vector Machine, respectively. The model achieved extraction accuracies of 92.92%, 93.40%, 87.67%, and 93.34% for evergreen trees, deciduous trees, shrubs, and grasslands, respectively. This result confirms that the combination of deep learning and high-resolution remote sensing images can effectively enhance the classification extraction of urban green space vegetation, providing technical support and data guarantees for the refined management of green spaces and garden cities in megacities such as Beijing.

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