一种基于控制点的影像内部几何精度检测方法

A internal geometric accuracy detection method based on control point for image

为检测1B级卫星影像的内部几何精度,引入控制点数据,通过精确几何纠正和误差统计分析等手段,消除绝对定位精度的影响,提出无系统误差的影像内部几何精度概念,设计了一种基于控制点的影像内部几何精度检测方法。布设控制点,建立检测区,并搜集两组卫星影像数据,对该概念及其检测方法进行了实验与分析,结果表明,该概念能够有效反映影像内部几何精度情况,检测方法探测效果显著,检测结果能够有效表达影像的内部几何变形情况,可为后续高精度测绘数据处理分析和应用选择提供支撑。

In order to test the quality of the 1 B image products, the impact of the image absolute positioning accuracy is eliminated by precise geometric correction and error statistical analysis, the concept of image internal geometric accuracy without systematic error is put forward and a method of internal geometric accuracy detection based on control point is designed.By setting up control points and establishing detection area, two sets of satellite image data are used to experiment and analyze the concept and its detection method.It is proved that the concept could effectively reflect the internal geometric accuracy of image and the method could effectively find and indicate the distortion of image, which could provide support for subsequent high-precision data processing and application selection.