一站式处理街景图像,让城市研究更高效可复现。
ZenSVI: An Open-Source Software for the Integrated Acquisition, Processing and Analysis of Street View Imagery Towards Scalable Urban Science
- 整合街景数据获取、处理与分析全流程,支持多平台接入。
- 可生成深度图、点云等多格式输出,适配多种研究需求。
- 适合无编程基础的城市研究者快速开展街景分析。
街景图像(SVI)在过去十年中被广泛用于理解街道特征与建成环境。交通、健康、建筑、人类感知和基础设施等领域的研究者采用不同方法分析SVI,但缺乏标准化流程,且各解决方案孤立部署,导致工作难以复现,新研究难以开展。利用SVI需经历多个技术环节:通过API大规模获取数据、图像预处理以统一格式、应用计算机视觉模型提取特征、进行空间分析。这些要求对城市研究者构成障碍,尤其是缺乏编程经验者。为此,我们开发了ZenSVI——一个免费开源的Python工具包,集成街景图像分析全链条流程,支持多平台(如Mapillary和KartaView)高效下载,分析图像元数据,应用计算机视觉模型提取目标特征,转换图像投影(如鱼眼、透视)与格式(如深度图、点云),可视化分析结果并导出至其他软件。我们在新加坡案例中展示了其在数据质量评估与聚类分析中的高效应用。该工具提升了基于SVI研究的透明性、可复现性与可扩展性,模块化设计便于功能拓展。
原文摘要 · Abstract (English)
Street view imagery (SVI) has been instrumental in many studies in the past decade to understand and characterize street features and the built environment. Researchers across a variety of domains, such as transportation, health, architecture, human perception, and infrastructure have employed different methods to analyze SVI. However, these applications and image-processing procedures have not been standardized, and solutions have been implemented in isolation, often making it difficult for others to reproduce existing work and carry out new research. Using SVI for research requires multiple technical steps: accessing APIs for scalable data collection, preprocessing images to standardize formats, implementing computer vision models for feature extraction, and conducting spatial analysis. These technical requirements create barriers for researchers in urban studies, particularly those without extensive programming experience. We developed ZenSVI, a free and open-source Python package that integrates and implements the entire process of SVI analysis, supporting a wide range of use cases. Its end-to-end pipeline includes downloading SVI from multiple platforms (e.g., Mapillary and KartaView) efficiently, analyzing metadata of SVI, applying computer vision models to extract target features, transforming SVI into different projections (e.g., fish-eye and perspective) and different formats (e.g., depth map and point cloud), visualizing analyses with maps and plots, and exporting outputs to other software tools. We demonstrated its use in Singapore through a case study of data quality assessment and clustering analysis in a streamlined manner. Our software improves the transparency, reproducibility, and scalability of research relying on SVI and supports researchers in conducting urban analyses efficiently. Its modular design facilitates extensions of the package for new use cases.
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