Unmanned aerial vehicle (UAV) remote sensing has a great application potential in geological disasters monitoring. A plenty of software for UAV image processing has appeared on the market in recent years. In order to provide a valuable reference for choosing UAV image processing software for geological disasters monitoring, the authors evaluated the mostly used software DPGrid, PixelGrid, DPMatrix and Inpho. A block of 644 UAV images of hilly areas acquired in Longnan County of Jiangxi Province by Cannon 5D MARK Ⅱ camera on board a fixed-wing UAV at a flying height of 600 m were used as test data. The preprocessing, aerial triangulation, DEM and DOM generation of these images were performed by one operator using the aforementioned software in the same test environment, then these kinds of software were analyzed in terms of function efficiency, product quality and workflow. The results show that all of these kinds of software have complete UAV image processing capability and the order of processing efficiency from high to low is Inpho, DPMatrix, DPGrid and PixelGrid. For geological disasters emergency survey, it's better to use DPGrid and DPMatrix to generate fast mosaic. For detailed geological disasters survey, all of these kinds of software can meet the requirement while DPGrid and PixelGrid are more suitable for precision control, Inpho and DPGrid are more suitable for brightness balance and color adjustment, and DPGrid is more suitable for editing DEM and DOM.
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