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[GIS program] 基于DCT变换的图像编码方法研究 DL : 0: 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 effect" but we can speed up the coding speed.
Date : 2025-12-25 Size : 4.78mb User : lzy
[GIS program] Douglas-Peucker-Line-Approximation-Algorithm DL : 0: 地理信息系统中，曲线数据压缩的道格拉斯压缩算法源码-Geographic information systems, data compression curve of Douglas-source compression algorithm
Date : 2025-12-25 Size : 14kb User : dshgis
[GIS program] C2DPushGraph_demo DL : 0: C2DPushGraph_demo是一个画图形的例子程序,有线形曲线,柱形曲线,饼状曲线等等.-C2DPushGraph_demo is a graphic example of painting procedures have linear curves, cylindrical curve, curve, etc. Pie.
Date : 2025-12-25 Size : 125kb User : carson
[GIS program] arcgis_engine DL : 0: 把线数据增加高程（增加Z值） SceneControl中实现画3DGraphics的方法曲线距离的测量-Line data to increase the height (an increase of Z value) SceneControl achieve 3DGraphics painting method of measuring the distance curve
Date : 2025-12-25 Size : 5kb User : 郑志华
[GIS program] 5 DL : 0: 加粗曲线的LISP程序，费了老大劲才搞出来，分享一下-Bold curve LISP procedures, fees劲才engage the boss out to share
Date : 2025-12-25 Size : 4kb User : zzghy
[GIS program] 11257445 DL : 0: 自动绘制等值线的方法从技术方向上看可以分为两大类,插值和曲线拟合.其中曲线拟合总的来说效果不如插值算法经典和应用广泛,效果也较逊色.这里着重介绍插值算法.-Automatic drawing method isogram direction from a technical point of view can be divided into two categories, interpolation and curve fitting. In which the effect of curve fitting in general than the classical interpolation algorithm and a wide range of applications, the results would be more favorably. Here interpolation algorithm highlights.
Date : 2025-12-25 Size : 227kb User : 毛毛
[GIS program] 2222CustomControldemo_src DL : 0: 工业用曲线绘制工业用曲线绘制工业用曲线绘制-Industrial Industrial Curve Curve
Date : 2025-12-25 Size : 9kb User : 李兄
[GIS program] gongyequxian DL : 0: 从国外下得一个VC做曲线的程序chardemo，还不错-From abroad were a VC to do the next curve of the procedure chardemo, not bad
Date : 2025-12-25 Size : 484kb User : panhai
[GIS program] LineBuffer DL : 0: 完成GIS中折线和曲线实体要素的缓冲区的生成-GIS in the line and complete the physical elements of the buffer curve generation
Date : 2025-12-25 Size : 3.65mb User : 闫庆庆
[GIS program] HH_GIS_SpAn DL : 0: GIS空间分析工具，我们的空间分析课程设计包含道格拉斯抽样、曲线插值与光滑、多边形最小凸包、点群分布参数（分布中心、分布密度、分布轴线等）。基本功能都实现了。-GIS spatial analysis tools, our curriculum includes Douglas spatial analysis sampling, interpolation and smooth curve, the minimum convex polygon, point group distribution parameters (distribution center, distribution density, distribution of axes, etc.). Basic functions are realized.
Date : 2025-12-25 Size : 4mb User : 黄华
[GIS program] MoveToElement DL : 0: AE开发中选择移动添加到mapcontrol 中的图形元素（文字、曲线、圆形、矩形等）-AE development choose to move to mapcontrol the graphic elements (text, curve, round, rectangular, etc.)
Date : 2025-12-25 Size : 5kb User : xianlin
[GIS program] DrawLine DL : 0: 此程序只要介绍的是线的画法，有直线曲线等-This procedure is described in lines as long as the painting, there is a straight line curve
Date : 2025-12-25 Size : 50kb User : multify
[GIS program] b3curve.ZIP DL : 0: 林易老师的曲线算法的论文，这种曲线的特点是过控制点，可以用于CAD和GIS。-Lin Yi teacher' s curve algorithm paper, the characteristics of this curve is over the control point, can be used for CAD and GIS.
Date : 2025-12-25 Size : 353kb User : sdzy
[GIS program] GIS DL : 0: GIS环境下缓和曲线绘制方法研究.The GIS environment study on drawing method of transition curve.-The GIS environment study on drawing method of transition curve.
Date : 2025-12-25 Size : 759kb User : dig
[GIS program] GeometryOperations DL : 0: ArcGIS开发中以COM组件形式绘制几何要素（点、多点、线、面、曲线、包络线、还有路径跟踪）-Draw geometric elements（Point,multPoints、 line, surface, curve, envelope, and path tracking）
Date : 2025-12-25 Size : 21kb User : Tan
[GIS program] Logistic--curve-prediction DL : 0: Logistic（逻辑斯蒂）曲线模型是一种预测模型，该代码实现了L曲线的预测。-Logistic curve model is an important method which used widely in prediction. This code will help achieve the prediction.
Date : 2025-12-25 Size : 3kb User : 啊呜
[GIS program] huanhequxian DL : 1: 工程测量学缓和曲线的vb代码：已知某曲线a,R,L,ZH点的里程，计算三点的坐标-Engineering surveying school transition curve vb code: known curve a, R, L, EN point of mileage, calculate the three-point coordinates
Date : 2025-12-25 Size : 5kb User : liuzhenyi
[GIS program] GIS DL : 0: gis道格拉斯算法，实现道格拉斯曲线抽样的算法-The gis Douglas algorithm, to achieve the Douglas curve sampling algorithm
Date : 2025-12-25 Size : 2.02mb User : Lee
[GIS program] fzy DL : 0: gis曲线反走样程序，用于生成光滑曲线，是生成光滑曲线最理想的算法-GIS program curve anti-aliasing, the best algorithm to generate a smooth curve
Date : 2025-12-25 Size : 3kb User : yeaidong
[GIS program] cbrcejiananalysis DL : 0: Matlab源程序代码,用于拟合超二次曲线,曲面的代码,-Matlab source code, used for super quadratic curve fitting, surface code, ha ha
Date : 2025-12-25 Size : 46kb User : kard_cxdee