本文结合DCT变换的特性，利用分形的Peano一hilbert扫描曲线，对基于DCT变换的图像编码方法进行了研究，并提出了改进方法。主要工作分为两个部分: 一是在分块DCT基础上的改进。对分块后生成的各图像块矩阵，不直接作二维DCT变换，而是先进行扫描，使之重排成一维向量，再进行一维DCT变换，这样可以减少运算量。 其次是对层次余弦变换编码部分的改进。使用层次DCT变换与零树编码相结合的方法，并在扫描编码过程中，按Peano一hilbert扫描顺序进行编码。这样不仅可以减少“块效应”，而且可以加快编码速度。-this paper the characteristics of DCT, using fractal Peano a Hilbert scanning curve, the DCT-based image coding method for the study and improvement of methods. The work is divided into two main parts : First, the DCT block on the basis of improvements. Right after block production of the image block matrix, not for direct two-dimensional DCT, but first scan, so they line up in a heavy-dimensional vector and then a peacekeeping DCT, thus reducing the amount of computation. Secondly, the level of cosine transform coding some of the improvements. The use level of DCT and zero tree coding combination of methods, coding and scanning process, according to a Hilbert Peano code scanning sequence. This will not only reduce the "blocking

mapinfo教程（ppt），共12章，适合初学者！包括：MapBasic介绍、MapBasic应用、MapX应用与开发等内容！-mapinfo tutorial (ppt), a total of 12 chapters, suitable for beginners! Include: MapBasic introduction, MapBasic application, MapX application and development and other content!

一个读取shapefile格式文件的程序,能够实现放大,缩小,漫游,很不错的程序.-read shapefiles format a document procedures can achieve amplification, narrow, roaming, very good procedures.

用mapx设计智能小区的研究，总体介绍了智能小区系统解决的方案，及在vc++中用到的相关的mapx函数-Intelligent community with MapX design research, in general, introduced Intelligent Community System for solutions, and vc++ Used in MapX function related

我的GPS作业,星历转换的~需要专业知识-GPS operations, ephemeris conversion to require professional knowledge

window下的开源gis系统,visual编译-open source in window, using visual studio2005

ArcEngine9.2和VB实现的地图编辑的功能，类似于ArcGis9.2地图编辑的功能，对要实现地图编辑功能的兄弟们来说非常有帮助，觉得有帮助的人一定要顶哦，记得要修改数据路径。-ArcEngine9.2 and VB realize the function of a map editor, map editor ArcGis9.2 similar to the function to be realized for map editing features brothers for the very helpful, I feel that help must be the top Oh, remember to amend data path.

(地图信息系统)中使用的源程序，(地图信息系统)中使用的源程序-(Map information system) used in the source code, (map information system) used in the source code

简易车辆导航系统，实现地图匹配，电话号码，单位设施，最优道路检索

以前一直在做AO相关的工作，现在转向AE。虽说，AE与AO的语法接近，但是在入门的时候还是比较不好下手的。经过两天的努力，终于在ESRI中国社区上找到一个关于建立ArcEngine的帖子，写得相当详细。根据该帖我终于建立起了一个框架