| 一种基于动态模板和等角变换的遥感影像地面控制点匹配算法 |
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| 引用本文： | 邓小炼,王长耀.一种基于动态模板和等角变换的遥感影像地面控制点匹配算法[J].测绘科学,2005,30(4):51-53. |
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| 作者姓名： | 邓小炼 王长耀 |
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| 作者单位： | 中国科学院遥感应用研究所,北京,100101;中国科学院遥感应用研究所,北京,100101 |
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| 基金项目： | 国家高技术研究发展计划(863计划)
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中国科学院知识创新工程项目 |
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| 摘 要： | 传统的基于影像灰度的控制点匹配算法,存在着运算量大,识别精度较低,约束条件多等不足。为解决上述问题,本文对传统算法进行了优化,主要思路是:在利用遥感影像先验知识确定搜索子区的基础上,首先采用动态模板进行不等距搜索,然后利用灰度相关系数双阈值和等角变换对目标控制点进行判别,最后结合控制点间的空间位置关系对未识别出的控制点进行定位。本文给出具体的实施流程,并结合ASTER和TM两种成像差异显著的图像数据,对优化前后的匹配算法均进行了试验,给出了试验结果和对比分析。结果表明,采用动态模板结合等角变换的匹配算法,无论在运算效率上,还是在控制点识别精度上,都较之传统匹配算法有明显优势,具有较强的适应性和应用价值。
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| 关 键 词： | 遥感影像 动态模板 不等距搜索 等角变换 地面控制点 匹配算法 |
| 文章编号： | 1009-2307(2005)04-0051-03 |
| 修稿时间： | 2004年10月29日 |
A remote sensing image ground control point matching algorithm based on dynamic template and conformal transform |
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| DENG Xiao-lian,WANG Chang-yao.A remote sensing image ground control point matching algorithm based on dynamic template and conformal transform[J].Science of Surveying and Mapping,2005,30(4):51-53. |
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| Authors: | DENG Xiao-lian WANG Chang-yao |
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| Abstract: | There are some shortages in traditional image matching algorithm based on gray degree,such as huge quantity of calculation,lower accuracy,and too many restrictions of application.In order to solve these problems,an optimized algorithm is introduced.It includes several aspects:on the basis of confirming the sub image by understanding prior knowledge of Remote Sensing image,the first step is to search the sub image unequdistantly with dynamic template,the second step is to locate the true target points by two thresholds of gray degree correlation coefficient and conformal transform,the last step is to calculate the true location of the false target points by the spatial location relations of ground control points.The work flow is described in detail.Moreover,a comparison between traditional and modified image matching algorithm is performed with an ASTER image and a TM image with distinct imaging differences.We can conclude that the modified algorithm is superior to the traditional one,with its higher accuracy and efficiency,its adaptability. |
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| Keywords: | remote sensing image dynamic template searching unequidistantly conformal transform ground control point matching algorithm |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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