WikiChurches – A Fine-Grained Dataset of Architectural Styles with Real-World Challenges

WikiChurches is a dataset for architectural style classification, consisting of 9,485 images of church buildings. Both images and style labels were sourced from Wikipedia. The dataset can serve as a benchmark for various research fields, as it combines numerous real-world challenges: fine-grained distinctions between classes based on subtle visual features, a comparatively small sample size, a highly imbalanced class distribution, a high variance of viewpoints, and a hierarchical organization of labels, where only some images are labeled at the most precise level. In addition, we provide 631 bounding box annotations of characteristic visual features for 139 churches from four major categories. These annotations can, for example, be useful for research on fine-grained classification, where additional expert knowledge about distinctive object parts is often available. Please refer to the README.md file for information about the different files contained in this dataset.

WikiChurches是一款面向建筑风格分类任务的数据集，共收录9485张教堂建筑图像。所有图像与风格标签均源自维基百科（Wikipedia）。该数据集可作为多类研究领域的基准测试集，因其涵盖了诸多真实场景下的挑战：基于细微视觉特征的类别间细粒度区分、相对有限的样本规模、高度不均衡的类别分布、多样化的拍摄视角，以及层级化的标签组织结构——仅部分图像被标注至最精细的类别层级。此外，我们为来自四大类别的139座教堂提供了631组标志性视觉特征的边界框（bounding box）标注。此类标注可辅助细粒度分类相关研究——这类研究通常需要依托关于目标物体独特部件的专业领域知识。有关该数据集包含的各类文件的详细说明，请参阅README.md文件。