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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...
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
- 2022-07-20 17:37:33下载
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基于AO/AE的GIS功能原型。
并且给大家封装好了两个逻辑处理层的DLL,朋友们可以直接引用。是对AO/AE的又一次抽象,开发更加灵活。...
基于AO/AE的GIS功能原型。
并且给大家封装好了两个逻辑处理层的DLL,朋友们可以直接引用。是对AO/AE的又一次抽象,开发更加灵活。-based AO/AE prototype GIS functions. Packaging and good for everyone to the two logic layer DLL, and friends can be directly invoked. The AO/AE another abstract and develop more flexible.
- 2022-04-17 21:47:28下载
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读取文档中邮件地址
读取文档中邮件地址
-Read the document e-mail address
- 2023-07-26 18:30:03下载
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The design of electronic map webgis methods, including design principles, data m...
电子地图webgis的设计方法介绍,包括设计原则,数据模型等-The design of electronic map webgis methods, including design principles, data models
- 2023-02-16 17:15:03下载
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mapx5.02开发手册
mapx5.02开发手册-mapx5.02 Development Manual
- 2022-03-19 04:55:28下载
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VB+Mapx5开发的GIS实例
VB+Mapx5开发的GIS实例-VB Mapx5 examples of GIS Development
- 2022-12-01 21:05:03下载
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mapxtreme2005初学代码~
主题地图的应用,及简单工具应用
mapxtreme2005初学代码~
主题地图的应用,及简单工具应用-beginner mapxtreme2005 code ~ the theme of the map application and the application of simple tools
- 2022-07-15 04:59:00下载
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vb+mo实际开发的例子:第一章:GIS发展概况C.
VB+MO实用开发例子:第一章:GIS开发简介;第二章:MO/VB二次开发入门;第三章:使用地图和图层,有详细的说明和例子;第四章:坐标系和几何对象;全书共九章,pdf格式。-VB+ MO practical development examples: First Chapter: GIS development profile Chapter: MO/VB secondary development of entry Chapter III: Using maps and layers, contains a detailed description and examples Chapter IV: coordinate system and geometry object book a total of nine chapters, pdf format.
- 2023-02-27 01:35:06下载
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此例主要实现了mapinfo回调函数的实现,让初学者很好体会setcallback的工作原理....
此例主要实现了mapinfo回调函数的实现,让初学者很好体会setcallback的工作原理.-such cases main MapInfo callback function of the realization of a very good experience for beginners setcallback works.
- 2023-07-12 21:00:02下载
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这是一篇关于倾斜设计面的三角网法土方量计算的论文,可以作为参考...
这是一篇关于倾斜设计面的三角网法土方量计算的论文,可以作为参考-This is a design on the tilt of the triangular mesh surface earthwork calculation of the papers, can be used as reference
- 2023-02-26 04:20:03下载
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