提出同名点的信噪比是影响坐标变换质量的根本因素,各种变换方法的区别在于对信号的模拟能力和抗噪音干扰能力。设计一套包含可靠性指标和模拟水平指标的坐标变换评价体系。通过计算各个同名点的多余观测分量和内、外可靠性,评价在某种坐标变换方法下各同名点发现和抵抗噪音的能力,通过讨论坐标变换过程的精度和扩展性、可逆性、唯一性,评价各种模型面对不同应用要求时对信号的模拟能力。对典型数据的对比试验证明采用上述指标的可行性、必要性和有效性,考察了不同几何条件和变换模型对上述指标的影响,指出改善几何条件的办法和各种变换模型适用的条件。 更多还原
【Abstract】 It is presented that the crucial factor for the quality of coordinate transformation is the signal-to-noise ratio(SNR) of common points,so differences among transformation models are their simulation ability of signals,detectability and defensibility of noises.Then,a new quality evaluation system of coordinate transformation,including reliability indicators and simulation indicators,is put forward.The reliability indicators include the redundant observation components,inner and external reliabil... 更多还原