Landsat-8长条带影像正射校正

发布时间：2018-05-01 04:24

本文选题：Landsat- + 长条带影像　；参考：《中国图象图形学报》2017年09期

【摘要】：目的 Landsat-8传感器采用线阵推扫式成像,通过分景处理获得标准景产品。面对大范围遥感数据需求,长条带数据具有更高的应用价值。长条带数据的一般获取方法是通过拼接标准景正射产品的方式,该方法处理效率不高,并且当条带中某景由于云覆盖量较多无法生产正射产品时,将无法通过多景拼接的方式生成相应的长条带正射产品。针对此方法存在的问题,本文提出一种Landsat-8长条带影像的正射校正方法。方法以长条带影像为整体,通过控制点匹配、长条带几何精校正和正射校正3个部分,直接生成长条带级别的正射校正产品。在长条带几何精校正过程中,提出了Landsat-8的基于轨道约束的长条带平差模型及控制点优化选取方法。结果在15景的条带长度范围内,本文方法生成的长条带正射产品的几何精度在12 m以内,满足Landsat-8正射产品的精度要求,且处理效率相较于标准景拼接方式提升1倍左右;对于云覆盖较多的景,利用连续3景进行长条带正射校正,可以得到与标准景正射产品几何精度相当的长条带正射产品。结论本文提出的长条带处理方法,在一定长度范围内,能够得到满足Landsat-8正射产品的精度要求的长条带正射产品,处理效率得到较大提高,且能够有效克服传统方法中云覆盖情形对长条带产品获取的限制。
[Abstract]:Objective to obtain the standard Landsat-8 sensor by using linear push-scan imaging. In the face of a wide range of remote sensing data demand, strip data has higher application value. The general method of obtaining long strip data is by splicing the standard shot products. This method is inefficient, and when a scene in the strip can not produce orthotropic products because of the large cloud coverage, You will not be able to generate the corresponding long strip forward shooting product by multi-view splicing. Aiming at the problems of this method, this paper presents a orthophoto correction method for Landsat-8 strip images. Methods the long strip image was taken as a whole. Through the control point matching, the strip geometric precision correction and the orthophoto correction, the product of the long strip level orthophoto correction was generated directly. In the process of strip geometric fine correction, the adjustment model of long strip based on orbit constraint and the optimal selection method of control point of Landsat-8 are put forward. Results the geometric accuracy of the long strip forward projectile produced by this method was less than 12 m in the range of the strip length of 15 scenes, which satisfied the precision requirement of the Landsat-8 forward shooting product, and the processing efficiency was about twice higher than that of the standard pattern. For the scene with more cloud cover, the long strip forward projecting product with geometric accuracy comparable to the standard one can be obtained by using 3 consecutive scenes to correct the long strip forward projection. Conclusion the long strip processing method proposed in this paper can obtain the long strip positive projectile which can meet the precision requirement of the Landsat-8 forward projectile in a certain length range, and the treatment efficiency has been greatly improved. And it can effectively overcome the limitation of cloud coverage in traditional methods to obtain strip products.
【作者单位】：中国科学院遥感与数字地球研究所;中国科学院大学;山东省国土测绘院;
【基金】：中国科学院遥感与数字地球所所长青年基金(A类)
【分类号】：TP751

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