机载三线阵CCD摄影中心轨迹及姿态拟合的半参数法
Semi-Parametric Fitting of the Track of Perspective Center and Attitude of Airborne TLS CCD System
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摘要: 只要给出摄像瞬间摄像中心的位置和摄像平台的姿态,通过机载三线阵CCD获取的影像就可以直接解算地面点坐标。拟合摄像中心的位置函数和摄像平台的姿态函数是机载三线阵CCD摄影测量的最基本问题。针对由GPS/INS得到的摄像平台位置和姿态观测值,提出了半参数拟合法。模拟计算表明,这种方法可以有效地克服对飞行轨迹及姿态的先验数学模型的模型误差,从而达到较高的精度。Abstract: When the position of the perspective center and the attitude of the CCD camera on the exposing time is known,the coordinates of ground points can be calculated from the images gotten from TSL CCD.The method for fitting the position of the camera center and the attitude functions is basic for image georeferencing.According to the character of the data given by GPS/INS,a semi-parametric method is proposed.Simulated calculation indicates that this method can reduce the systematic errors significantly.
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