遥感图像纠正误差的局部变形改正

王峰; 史文中; 程朋根

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遥感图像纠正误差的局部变形改正

王峰, 史文中, 程朋根

文章导航 > 武汉大学学报 ● 信息科学版 > 2001 > 26(5): 425-429

王峰, 史文中, 程朋根. 遥感图像纠正误差的局部变形改正[J]. 武汉大学学报 ● 信息科学版, 2001, 26(5): 425-429.

引用本文:

王峰, 史文中, 程朋根. 遥感图像纠正误差的局部变形改正[J]. 武汉大学学报 ● 信息科学版, 2001, 26(5): 425-429.

WANG Feng, SHI Wenzhong, CHENG Penggen. Partial Distortion Correction of Rectification Error of Remote Sensing Images[J]. Geomatics and Information Science of Wuhan University, 2001, 26(5): 425-429.

Citation:

WANG Feng, SHI Wenzhong, CHENG Penggen. Partial Distortion Correction of Rectification Error of Remote Sensing Images[J]. Geomatics and Information Science of Wuhan University, 2001, 26(5): 425-429.

遥感图像纠正误差的局部变形改正

1 中国地震局地震研究所, 武汉市小洪山, 430071;
2 香港理工大学土地测量与地理资讯学系, 香港九龙红磡

基金项目: 国家人事部留学回国人员科技活动基金资助项目;香港理工大学资助项目(1.34.37.9709)

详细信息

作者简介:
王峰,副研究员,博士生。主要从事遥感技术应用、三维城市地理信息系统、影像数据库等的理论研究和软件开发工作。代表成果:遥感图像可视化纠正软件;煤田火灾信息系统;三维城市的快速表现技术等。E-mail:itcwangfeng@sina.com

中图分类号: TP751

Partial Distortion Correction of Rectification Error of Remote Sensing Images

1 Institute of Seismology, China Seismological Bureau, Xiaohongshan, Wuhan, China, 430071;
2 Department of Land Surveying & Geo-informatics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong

摘要: 为了显示遥感图像的局部变形,本文提出了将遥感图像与数字栅格地图(DRG)或数字线划图(DLG)叠加显示和检查局部变形误差的方法,该方法在图像漫游和缩放的支持下,可以直观地显示出局部变形是否存在于几何纠正后的遥感图像中。为了解决遥感图像的局部变形问题,本文提出了将多边形的内部变形分解为多个三角形变形的纠正方案,并详细介绍了三角形几何变形纠正的原理。实例证明了本文方法的的可行性和有效性。
- 遥感图像 /
- 几何纠正 /
- 纠正误差 /
- 局部变形
Abstract: At present,geometric rectification of remote sensing image mainly adopts the method of digital rectification in which control points are very important to image rectification quality.In actual work,the accuracy of control points is always affected by many factors that cause partial dis-tortion in rectified remote sensing image.Partial distortion error existing in rectified remote sens-ing images is not paid much attention to,and many remote sensing processing software lacks the a-[FK(W21?40ZQ]bility to deal this problem. This paper presents a method to check and display the partial distortion error by overlaying remote sensing image and digital raster graphics (DRG) or digital line graphics (DLG) with the support of image roaming and scaling,which visually shows whether partial distortion exists or not in rectified image.To solve the problem on partial distortion,triangle transformation algorithm,a scheme of disassembling polygon into multi-triangles,the principle of triangle geometric distortion are introduced.In the experimental research,this paper selects aerial image and 1:10000 topographical map to match and to be rectified.First,digital raster graphics (DRG) is generated from 1:10000 topographical map rectified by ERDAS remote sensing image processing software,then 16 points are selected separately from aerial image and DRG,image rectified by polynomial equation in ERDAS with the reported mean error of 3.3887 pixels,image distortion error is checked by overlaying DRG with rectified image.In flat areas,the distortion can not be observed,while in mountain areas the distortion is obvious.With the software developed under Windows using simplified algorithm presented here,the partial distortion is corrected in two steps with different quad size.The partial distortion rectification is done in the environment of image overlaying,so it guarantees the correctness of the partial distortion.The partial distortion rectification is very fast,because the rectification area is small,and the calculation amount is also small as well.Results show that algorithm presented in this paper is feasible.Further research will be focused on overlaying image with image having different time phases and distortion rectification inside arbitrary polygon.
- remote sensing image /
- geometric rectification /
- rectification error /
- partial distortion

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遥感图像纠正误差的局部变形改正

1 中国地震局地震研究所, 武汉市小洪山, 430071;

2 香港理工大学土地测量与地理资讯学系, 香港九龙红磡

基金项目: 国家人事部留学回国人员科技活动基金资助项目;香港理工大学资助项目(1.34.37.9709)

作者简介:
王峰,副研究员,博士生。主要从事遥感技术应用、三维城市地理信息系统、影像数据库等的理论研究和软件开发工作。代表成果:遥感图像可视化纠正软件;煤田火灾信息系统;三维城市的快速表现技术等。E-mail:itcwangfeng@sina.com

收稿日期: 2001-04-10
刊出日期: 2001-05-05

中图分类号: TP751

关键词:

摘要: 为了显示遥感图像的局部变形,本文提出了将遥感图像与数字栅格地图(DRG)或数字线划图(DLG)叠加显示和检查局部变形误差的方法,该方法在图像漫游和缩放的支持下,可以直观地显示出局部变形是否存在于几何纠正后的遥感图像中。为了解决遥感图像的局部变形问题,本文提出了将多边形的内部变形分解为多个三角形变形的纠正方案,并详细介绍了三角形几何变形纠正的原理。实例证明了本文方法的的可行性和有效性。

English Abstract

Partial Distortion Correction of Rectification Error of Remote Sensing Images

1 Institute of Seismology, China Seismological Bureau, Xiaohongshan, Wuhan, China, 430071;

2 Department of Land Surveying & Geo-informatics, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong

Received Date: 2001-04-10
Publish Date: 2001-05-05

Keywords:

Abstract: At present,geometric rectification of remote sensing image mainly adopts the method of digital rectification in which control points are very important to image rectification quality.In actual work,the accuracy of control points is always affected by many factors that cause partial dis-tortion in rectified remote sensing image.Partial distortion error existing in rectified remote sens-ing images is not paid much attention to,and many remote sensing processing software lacks the a-[FK(W21?40ZQ]bility to deal this problem. This paper presents a method to check and display the partial distortion error by overlaying remote sensing image and digital raster graphics (DRG) or digital line graphics (DLG) with the support of image roaming and scaling,which visually shows whether partial distortion exists or not in rectified image.To solve the problem on partial distortion,triangle transformation algorithm,a scheme of disassembling polygon into multi-triangles,the principle of triangle geometric distortion are introduced.In the experimental research,this paper selects aerial image and 1:10000 topographical map to match and to be rectified.First,digital raster graphics (DRG) is generated from 1:10000 topographical map rectified by ERDAS remote sensing image processing software,then 16 points are selected separately from aerial image and DRG,image rectified by polynomial equation in ERDAS with the reported mean error of 3.3887 pixels,image distortion error is checked by overlaying DRG with rectified image.In flat areas,the distortion can not be observed,while in mountain areas the distortion is obvious.With the software developed under Windows using simplified algorithm presented here,the partial distortion is corrected in two steps with different quad size.The partial distortion rectification is done in the environment of image overlaying,so it guarantees the correctness of the partial distortion.The partial distortion rectification is very fast,because the rectification area is small,and the calculation amount is also small as well.Results show that algorithm presented in this paper is feasible.Further research will be focused on overlaying image with image having different time phases and distortion rectification inside arbitrary polygon.

王峰, 史文中, 程朋根. 遥感图像纠正误差的局部变形改正[J]. 武汉大学学报 ● 信息科学版, 2001, 26(5): 425-429.

引用本文:

王峰, 史文中, 程朋根. 遥感图像纠正误差的局部变形改正[J]. 武汉大学学报 ● 信息科学版, 2001, 26(5): 425-429.

WANG Feng, SHI Wenzhong, CHENG Penggen. Partial Distortion Correction of Rectification Error of Remote Sensing Images[J]. Geomatics and Information Science of Wuhan University, 2001, 26(5): 425-429.

Citation: