一种TDI CCD推扫影像的坐标反变换方法

发布时间：2018-06-13 17:12

本文选题：TDI + CCD推扫影像　；参考：《武汉大学学报(信息科学版)》2016年05期

【摘要】：坐标反变换即根据已知的物方坐标求其像方坐标的过程,是线阵推扫式影像几何处理的重要计算环节。对于时间延迟积分电荷耦合器件(time delay integration charge coupled devices,TDI CCD)推扫影像,由于行积分时间跳变,若直接基于共线方程模型进行坐标反变换计算,不仅迭代次数多,在某些情况下还会出现不收敛的情况;利用有理多项式模型等通用成像几何模型替代其共线方程模型时,又存在拟合精度不高难以满足实际要求的问题。对此,本文提出了一种基于虚拟扫描行的TDI CCD推扫影像坐标反变换方法,巧妙地解决了TDI CCD推扫影像坐标反变换的效率和精度问题,利用国产资源卫星进行实验验证了此方法的正确性和可行性。
[Abstract]:The inverse transformation of coordinates, which is an important part of the geometric processing of linear push-sweep images, is the process of calculating the image coordinates according to the known object coordinates. For the time delay integral charge coupled device (TDC) push-over image, because of the line integral time jump, if the coordinate inverse transformation is calculated directly based on the collinear equation model, not only the number of iterations is more, In some cases there will be no convergence and when the collinear equation model is replaced by the general imaging geometric model such as rational polynomial model there is a problem that the fitting accuracy is not high enough to meet the practical requirements. In this paper, a method of inverse transformation of TDI CCD push-scan image coordinate based on virtual scanning line is proposed, which solves the problem of efficiency and precision of the inverse transformation of TDI CCD push-scan image coordinate. The correctness and feasibility of this method are verified by using domestic resource satellite.
【作者单位】：武汉大学测绘遥感信息工程国家重点实验室;国家测绘地理信息局卫星测绘应用中心;
【基金】：国家自然科学基金(40901209;91438111)~~
【分类号】：P23

【相似文献】