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由于桥梁室内模型形变点和控制点整体上具有近刚体性质,在摄测自动化监测过程中使用动态规划方法对桥梁室内模型形变点及检测控制点进行跨历元跟踪可以获得5个像素以内的初始精度,再使用如最小二乘匹配、灰度矩亚像素边缘匹配等方法在初始位置周围进行搜索即可收敛到点的准确位置,从图像像素点到三维坐标的转换可使用不需要内外方位元素且适用于非量测相机的直接线性变换(Direct Linear Transformation)进行。实验证明,动态规划方法对于近刚体的桥梁室内模型形变点和控制点的跨历元跟踪是有效的。
Due to the nearly rigid body nature of the deformation points and control points in the bridge indoor model, the dynamic programming method can be used to track the deformation points of the bridge indoor model and the detection control points through the epoch-tracking in the automatic monitoring process. Accuracy, and then use methods such as least-squares matching, gray-level sub-pixel edge matching and other methods to search around the initial position can be converged to the exact point, the conversion from the image pixel to the three-dimensional coordinates can be used without internal and external orientation elements And is suitable for direct linear transformation of non-metric cameras. Experiments show that the dynamic programming method is effective for near-body-span bridge indoor model deformation points and control points.