中国科学技术大学学报 ›› 2013, Vol. 43 ›› Issue (2): 110-114.DOI: 10.3969/j.issn.0253-2778.2013.02.004

• 原创论文 • 上一篇    下一篇

基于有理函数模型和多项式模型的 天绘一号影像几何校正精度评估

朱 倩   

  1. 1.长安大学地球科学与资源学院,陕西西安 710054;2.国家测绘地理信息局第一大地测量队,陕西西安 710054
  • 收稿日期:2012-11-01 修回日期:2012-12-28 出版日期:2013-02-28 发布日期:2013-02-28
  • 通讯作者: 朱倩
  • 作者简介:朱倩(通讯作者),女,1983年生,博士生. 研究方向:遥感技术、地理信息技术等. E-mail:qian15086@st.chd.edu.cn
  • 基金资助:
    国家自然科学基金(41101445)资助.

Accuracy assessment of TH-1 satellite image geometric correction using rational function model and polynomial model

ZHU Qian   

  1. 1.College of Earth Science and Resources, Changan University, Xian 710054, China; 2.Geodetic First Team, National Administration of Surveying, Mapping and Geoinformation, Xian 710054, China
  • Received:2012-11-01 Revised:2012-12-28 Online:2013-02-28 Published:2013-02-28

摘要: 研究了不同地貌特征的TH-1影像基于多项式模型和有理函数模型的几何校正精度,以及在每种模型下不同控制点个数与几何校正精度的关系.实验结果表明,TH-1影像因光学投影产生的比如扭曲变形等误差较大,有理函数模型中只需较少控制点便可明显提高其几何校正精度;多项式模型中,控制点的数量越多对精度提高越有好处,2阶多项式校正精度最高;在没有参数模型的情况下,高阶有理函数模型是TH-1影像几何校正的最佳选择.

关键词: 有理函数模型, 几何校正, 多项式模型, 天绘一号(TH-1), 精度

Abstract: Based on RFM (rational function model) and the polynomial model, the geometric correction precision of TH-1 satellite images was studied on different landforms, and the relationship between the number of GCPs (ground control points) and geometric correction precision was also studied. Experimental results show that TH-1 images have a magnitude distortion caused by optical projection; RFM can obviously improve TH-1 geometric correction precision with only a few GCPs; in the polynomial model, more GCPs can achieve higher correction precision, and 2 order can get the highest correction precision; without a parameter model, high order RFM is the best choice for TH-1 image geometric correction.

Key words: RFM, geometric correction, polynomial model, TH-1 satellite, accuracy