To the primary contradiction of rtdivs , limited bandwidth of network and real time transmitting parameter of relative to move sight , the modeling theory , and the method of development and encoding theory are researched deeply . interactive platform of automation vectorization of 2 - d image and remarking is set up in this way . the control mechanism of 3 - d visual object of agent is discussed , and vf - sdm , visual federation synthetic development method is presented 论文以作者建立的信息模型反映理论为指导,针对rtdivs的主要矛盾,即网络有限带宽与视景运动交互参数实时传输矛盾,对仿真建模理论、软件开发方法、信息编码理论进行了深入研究,建立了二维图像自动矢量化标注交互软件平台,深入探讨了三维视体自主运动控制机理,提出了视景联邦综合开发方法( vf - sdm - visualfederationsyntheticdevdopmentmethod ) 。
And pick - up the information system needed , vectorization and design according to themes , and the output of productive maps by arcview gis3 . 2 combining with the research achievement of the internet - bar management presentation of taian city after correction , matching , mosaic , convolution , resolution , making dom etc . then , the integer design and the particular design have completed and the functions of inquiry , editing , statistics and analysis to internet - bar information have realized 通过纠正、配准、镶嵌、滤波、融合等工艺制作正射影像图( dom ) ,结合泰安市网吧管理现状的调研结果,运用arcviewgis3 . 2软件对遥感正射影像提取出系统所需要的信息,分层矢量化和分层设计,输出成果图。在此基础上,运用arcview3 . 2软件进行泰安市网吧地理信息系统的整体设计和详细设计,实现对网吧信息的查询、编辑、统计和分析等功能,并由此为公安、文化、工商等泰安市网吧管理行政部门提出合理化建议。
But , such a vectorization will bring at least three potential problems : 1 ) structural or local contextual infor mation may be broken down ; 2 ) the higher the dimension of input pattern , the more me mory space are needed for the weight vector related to a classifier ; 3 ) when the dimension of a vector pattern is very high and while the sample size is small , it is easy to be overtrained 如此转换至少会带来三个不足: 1 )空间或结构信息可能会遭到破坏; 2 )由于权向量的维数等于输入模式的维数,当输入模式维数很大时,权值的存储空间相应的会很大; 3 )对于大维数的向量模式,当样本数不多的时候,利用线性分类器易导致过拟合。
With the development of the technology of the computer and modern manufacturing technology , the study of scanning , discerning and vectorization of engineering drawing is becoming one kind of realistic , demand more and more . it has very high using value and economic benefits to the obtaining of manufacturing system information and the picture shelf management of the enterprise 随着计算机技术及现代制造技术的发展,工程图扫描识别及矢量化的研究越来越成为一种的实际的需求,对制造系统信息的获取,企业图档的管理具有很高的应用价值和经济效益。
The article illuminates mainly two segments color - separation model based on three dimensions , gives a model conception on a knowledge base of unification technology and analyse and design digital prepress system from the whole on the problem of systemic requirement analysis . second , the article brings forward new data compress method based on memory stream and sets up new data structure to realize undo and redo methods based on analyzing all kinds of datas referred to on systemic based construction . because printing and dyeing cad system deals with many arithmetics on graphics ans image and production technics , the article illuminates vector conception , expatiates gray graphic vectorization and brings forward to graphic component ' s conception to enhangce the systemic stability and manipulating speed and improve graphic transmission 在印染cad系统的需求分析问题中,结合目前印染行业的发展和实际cad系统的整体构架,着重阐述了基于三维空间的二段法分色模型,提出了一体化工艺知识库这个模型的概念,对数字印前系统做了整体的分析、设计在系统的底层架构问题上,着重分析了cad系统涉及到的各类数据,提出一种新型的基于内存流的数据压缩方法,同时设计了自己的数据结构,用以实现系统的undo 、 redo操作,由于整个系统涉及众多的图形图像算法和实际工艺,为了提高系统的稳定性和操作速度,以及增强图像的网络传输功能,在部分算法中采用了矢量的概念,着重讲解了灰度图像矢量化,并且提出了图像组件这一崭新的概念。
Then 3d gis and its construct is introduces briefly , and the relevant background and theory are studied , such as picture segmentation , pattern recognition and vectorization technology , etc . it is discussed in detail how to realize the data entry of contour lines ( include extraction , pretreatment , vectorization and making dem ) in 3d gis by using computer graphics , image processing and visualization programming technology , and a complete set of concrete scheme to design a system recognizing automatically contour lines from scanned data of map is put forward 论文从地理信息系统领域研究应用的历史和现状入手,简要介绍了三维地理信息系统及其构成,研究了相关的背景与理论知识,如图像分割、模式识别和矢量化技术等等。论文重点阐述了如何运用计算机图形学、图像处理、可视化编程技术等实现三维地理信息系统等高线要素的数据输入(即提取、预处理、矢量化和网格化生成dem数据高程模型这几个基本内容) ,并提出了地图扫描数据等高线自动识别系统设计的一整套具体方案。
Correcting manually for vectorized errors is needed and it is a time - consuming process . research on improving output data qualities from vectorization system is significant for enhancing performance of raster - to - vector systems . in this dissertation , the author presents a recognition quality evaluating mechanism that provides the system with the ability of measure the quality of each primitive generated 本文围绕这一主题开展矢量化工程图的后处理技术研究,提出“基于识别质量评价”的矢量图素错误自动判别和校正的解决方案,使得图纸扫描转换系统不但具有产生矢量化数据的能力,而且具有对所产生的矢量数据的质量进行评价分析和自适应校正的能力。
The prominent features of this algorithm are as follows : correctly dealing with cross and corner by adopting junction recovery process which adjusts the length of tracking step according to the demand ; compressing the amount of data , editing image and drawing new graph more easily by extracting coordinates of the center , radius , start point and end point of circle , avoiding the gap of circular arc ; ensuring the critical points in the image as less as possible . the results show this vectorization algorithm can make good vector images 该算法在处理拐角、交叉区域时,运用了矫正处理流程,通过调整步长以产生正确的矢量;在处理圆和圆弧时,用圆心、半径、圆弧的起点和终点表示,大大减少了图元占用的存储空间,使得对图形的进一步处理更容易,效果更好,同时也解决了圆弧断裂的问题;在提取关键点的过程中,保证了整个图像中尽可能少的关键点数量。
Thus using gis technique to manage the debris flow hazard ' s spatial data would be a suitable method . based on the wholly design of the debris flow hazard database , this thesis begins with setting up the debris flow hazard graph database with mapgis tool . following the work flows , i . e . vectorization , graphic edit , error adjustment and map collection 探讨了在mapgis中如何快捷有效地建立泥石流灾害图形数据库,即按照矢量化、图形编辑、误差校正、图幅拼接等流程进行;选用microsoftaccess建立泥石流灾害属性数据库;通过在图形数据库和属性数据库中设立主关键字来实现图形数据和属性数据的无缝连接。
For example , well computer drawing ' s back grids and well curves intercross frequently , and their gray are near . at the same time , grids are skimble - scamble , and so on . we introduce a new vectorization model - “ progressive - simplification based vectorization model ” and bring forward a layered - tracing vectorization method for curves 例如:测井解释成果图的背景网格与曲线频繁交叉、灰度相近,网格尺寸不固定等,提出了基于逐步简化的矢量化模型,对图纸进行分层次跟踪的曲线矢量化方法。