Abstract: [Purposes] Hyperspectral cameras are important instruments for low-altitude data acquisition,and accurate calibration of camera mounting parameters is essential for generating high-precision DOMs.A high-precision calibration method is proposed. [Methods] By dynamically adjusting the mounting parameters,the exterior orientation elements of line-scan imagery are recovered in near real time,and image-based point clouds are generated.Under the same viewing geometry,these point clouds are registered with known high-precision point cloud data through integrated feature matching,enabling high-accuracy calibration of the camera mounting parameters. [Findings] The calibrated parameters were applied to image rectification and DOM generation.The resulting DOMs exhibited no obvious stitching errors between adjacent flight strips,eliminating the need for secondary processing and significantly improving operational efficiency. [Conclusions] Practical applications demonstrate that the proposed method is feasible and effective.The method can also be extended to the calibration of mounting parameters for other line-scan cameras．

Key words: line-scan camera, mounting parameter calibration, comprehensive feature registration