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首页> 外文期刊>IEEE Geoscience and Remote Sensing Letters >Bundle Block Adjustment of Tilt-Shift-Based Multidigital Camera System by Rigorous Orientation Model
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Bundle Block Adjustment of Tilt-Shift-Based Multidigital Camera System by Rigorous Orientation Model

机译：基于严格定位模型的基于倾斜移位的数字相机系统束块调整

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摘要

Thorough application research of multidigital camera system (MDCS) based on tilt-shift technology has commenced since its prototype system was finished. This letter aims to study mapping applications of tilt-shift-based MDCS with inertial measurement unit and differential global positioning system (IMU/DGPS) data. A rigorous orientation model with equivalent inner orientation elements (IOEs) and digital distortion model (DDM) is proposed to be used in the IMU/DGPS-assisted bundle block adjustment (BBA) for improving geometric accuracy. In this letter, the indoor control field and calibration devices developed by our research team were directly applied to construct equivalent IOEs and DDM of a virtual camera. Two sets of IMU/DGPS-assisted BBA experiments with and without our proposed model and ground control points (GCPs) are presented in this letter, as well as the positioning accuracies. The experimental results illustrate that the positioning accuracies of 53.9 and 46.2 cm in planimetry and height are separately improved to 24.9 and 37.5 with the use of our proposed model in the IMU/DGPS-assisted BBA process at a flight height of 1000 m, ground sample distance of about 20 cm, and no GCP, and the higher accuracies of 19.0 cm in planimetry and 13.6 cm in height are achievable with the help of few GCPs. Therefore, the BBA by the proposed rigorous orientation model is considered practical and feasible for improving mapping accuracies of tilt-shift-based MDCS.
机译：自原型系统完成以来，已经开始了对基于倾斜移位技术的多数码相机系统（MDCS）的全面应用研究。这封信旨在研究基于惯性测量单元和差分全球定位系统（IMU / DGPS）数据的基于倾斜位移的MDCS的制图应用。提出将具有等效内部方向元素（IOE）和数字失真模型（DDM）的严格方向模型用于IMU / DGPS辅助束块调整（BBA），以提高几何精度。在这封信中，我们研究团队开发的室内控制场和校准设备被直接用于构建等效的虚拟摄像机的IOE和DDM。这封信介绍了两组IMU / DGPS辅助的BBA实验，有无我们建议的模型和地面控制点（GCP），以及定位精度。实验结果表明，在IMU / DGPS辅助BBA工艺中，在飞行高度为1000 m的地面样本中，使用我们提出的模型，在平面尺寸和高度上的定位精度分别为53.9和46.2 cm，分别提高到24.9和37.5几乎没有GCP的情况下，其最大距离约为20 cm，并且借助少量GCP可以实现更高精度的平面测量19.0 cm和高度13.6 cm。因此，通过提出的严格的定向模型进行的BBA被认为对于提高基于倾斜位移的MDCS的制图精度是切实可行的。

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