基于小波分量特征值匹配的高光谱影像分类

提出了一种基于小波分量特征值的高光谱影像分类算法。针对每个像素构建一个能反映该分量特征的函数，得到其特征值。再利用这些特征值与参考光谱的特征值进行匹配，从而对整幅影像实现分类。实验证明，该方法比传统的光谱角制图法和交叉相关系数法的分类精度有较大提高。     

基于SVG模版的网络地理信息服务应用研究

SVG对矢量图形的描述与地理信息系统对现实世界的某些抽象描述一致,空间数据可以转换成SVG文档来进行存储、传输和表现。在此提出一种基于SVG的空间数据组织方法,并在此基础上分析了基于DOM和脚本语言的地理信息交互的实现,最后通过一种基于SVG模版的网络地理信息服务原型及其具体实施验证了以SVG文档实现网络地理信息服务的可行性和实用性。     

威特DI2002测距仪性能及其与ME－3000反射镜匹配研究

本文通过对威特ＤＩ２００２测距仪性能的测试。发现影响测距精度的主要因素是ＧＲＴ１０－ＧＰＨ１Ａ的反射镜系统。威特ＤＩ２００２测距仪匹配ＭＥ－３０００反射镜后，需加两项改正，但观测精度显著提高，实测表明达到与ＭＥ－３０００测距仪相同的精度。     

利用遥感影像进行变化检测

首先分析了利用影像进行变化检测的紧迫要求和存在的困难 ,接着对变化检测的方法进行分类 ,提出将影像配准与变化检测整体同步解求的思想和在此基础上进行三维变化检测的可能性 ,并在文中概要介绍和比较了各种变化检测的 7种方法 ,最后展望了下一步应继续研究的方向。     

A HYBRID THINNING ALGORITHM FOR BINARY TOPOGRAPHY MAP

1　ＩｎｔｒｏｄｕｃｔｉｏｎＴｈｅｔｈｉｎｎｉｎｇｏｆｂｉｎａｒｙｉｍａｇｅｓｉｓａｎｉｍｐｏｒｔａｎｔｔｅｃｈｎｏｌｏｇｙｉｎｉｍａｇｅｓｐｒｏｃｅｓｓｉｎｇ .Ｉｔｉｓｏｆｔｅｎｕｓｅｄｔｏｅｘｔｒａｃｔｔｈｅｓｋｅｌｅｔｏｎｓｏｆｂｉｎａｒｙｉｍａｇｅｓｆｏｒｒｅｃｏｇｎｉｚ ｉｎｇｂｉｎａｒｙｏｂｊｅｃｔｓ .Ｉｔｈａｓｂｅｅｎｗｉｄｅｌｙａｐｐｌｉｅｄｉｎｍａｐｄｉｇｉｔｉｚｉｎｇ ,ｃｈａｒａｃｔｅｒｓｒｅｃｏｇｎｉｔｉｏｎ ,ａｄｖａｎｃｅｄａｎａｌｙｓｉｓｏｆｉｍａｇｅｓａｎｄｓｏｏｎ .Ｔ…     

Surface Matching and Change Detection Using a Modified Hough Transformation for Robust Parameter Estimation

Many photogrammetric and GIS applications, such as city modelling, change detection and object recognition, deal with surfaces. Change detection involves looking for differences between two surface models that are obtained from different sensors, for example an optical sensor and a laser scanner, or by the same sensor at different epochs. Surfaces obtained through a sampling process may also have to be compared for future processing (for example transformation parameter estimation and change detection). Surface matching is therefore an essential task in these applications. The matching of surfaces involves two steps. The first step deals with finding the correspondences between two surface points and/or patches. The second step requires the determination of transformation parameters between the two surfaces. However, since most surfaces consist of randomly distributed discrete points and may have different reference systems, finding the correspondences cannot be achieved without knowing the transformation parameters between the two surfaces. Conversely, deriving the transformation parameters requires the knowledge of the correspondence between the two point sets. The suggested approach for surface matching deals with randomly distributed data sets without the need for error prone interpolation and requires no point-to-point correspondence between the two surfaces under consideration. This research simultaneously solves for the correspondence and the transformation parameters using a Modified Iterated Hough Transform for robust parameter estimation. Several experiments are conducted to prove the feasibility and the robustness of the suggested approach, even when a high percentage of change exists.     

基于线要素的图幅自动接边问题的探讨

文中介绍了基于线要素的图幅自动接边的基本算法 ,主要分 3步完成 :待拼接数据链的提取 ,属性匹配和图形拼接 ,给出了具体的实现过程 ,并应用某区的地貌数据进行了实际检验。同时还进一步探讨了交通信息管理中图幅之间道路要素的拓扑连接问题     

Enhancing group resolution of TM6 based on multi-variate regression model and semi-variogram function

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动态DEM匹配方法研究

在回顾现有制导技术之后,提出了一种新的导弹制导思想---利用动态DEM匹配方法实现导弹制导。在介绍这一思想及其实现步骤之后,文章着重介绍动态DEM匹配阶段中涉及的几个关键环节,即特征提取、特征描述、特征匹配、变换参数的解求以及相关匹配的改进等问题,最后,用实验验证了上述思想,得出结论,并为今后进一步研究提出了若干建议。