Peng M.Y.JEN-JER JAW2025-05-172025-05-172024-11-17https://www.scopus.com/record/display.uri?eid=2-s2.0-85217769352&origin=recordpagehttps://scholars.lib.ntu.edu.tw/handle/123456789/729393A weather station should accurately represent the characteristics of its surrounding environment. To assess a weather station's suitability, it is essential to consider the spatial range that the meteorological instruments can cover, typically reflected by the exposure, which indicates the openness of the location. Before installing a rain gauge, it is necessary to assess the environmental exposure, as excessive obstruction can lead to inaccurate rainfall measurements. An omnidirectional camera is a camera with a 360-degree field of view in the horizontal plane, or with a visual field that covers a hemisphere or approximately the entire sphere. Using a camera with a wide-angle effect can quickly gather environmental information, making it an ideal tool for estimating the exposure of rain gauges. The image-based approach offers benefits such as low cost and simplified fieldwork as well. For estimating the exposure of rain gauges, this study employs a professional fisheye lens to provide rigorous and flexible methods and uses a dual fisheye camera to offer an adaptable method. The results demonstrate the suitability of these camera tools.falseDual-fisheye cameraFisheye lensImage-based analysisRain gauge exposureconference paper2-s2.0-85217769352