Research on Application of Visual Simulation System of Expressway

1 Introduction With the interlaced development of computer science and civil engineering, visual simulation has become a comprehensive technology that uses virtual model to research and analyze the real or assumed system based on mathematics theories, modeling techniques and information technology. Recently, it has been applied success fully in expressway construction. With this technology, the abstract data can be dealt with the visualization process to generate 3D models and realize visual e…     

Introduction to Visual Surveillance of Dynamic Scenes

Asanactiveresearchtopicincomputervision ,visualsurveillanceofdynamicscenesat temptstodetect,recognizeandtrackmovingobjectsfromimagesequences ,andmoregeneral ly ,tounderstandanddescribeobjectbehaviors.Theaimistodevelopintelligentvisualsurveil lancesystemsinordertoreplace ,atleastpartially ,traditionalhuman operator basedvideosurveillancesystemswhichprovetobeineffectiveasthenumberofcamerasexceedsthecapabil ityofhumanattention .Inshort,thegoalofvisualsurveillanceisnotonlytoputcamerasinplaceofhuma…     

Implementation and Application of Visual Simulation System for Digital Campus

Fundamental conception and technological features of Digital Campus as well as the general framework of its visualization subsystem are introduced. A practical case of visual campus simulation system of Huazhong University of Science and Technology is described. The key issues of simulation application based on Creator and Vega are discussed in detail and some applications of the visual campus system are also given.1     

从Visual Basic到Visual Basic.Net

程序谷电子篇 在20世纪九十年代初期,面向Windows编程还是一项非常繁琐的工作,当时Borland C 是开发Windows应用程序     

Visual–haptic perception of compliant objects in artificially generated environments

Perception of compliant objects through a human system interface with visual–haptic feedback was investigated. Participants had to explore virtual cubes at different compliances by squeezing them with their fingers and observing them visually and haptically. The cubes were rendered by admittance control. Perception of compliance was analyzed using an adaptive staircase method. Results showed that visual–haptic perception of compliant environments is less accurate than perception of position and force stimuli. Furthermore, due to the important role of the visual feedback cross-modal comparisons are more difficult than bimodal comparisons.

Visual Basic茁壮成长

VB曾经作为一种通用的工具,而如今为了竞争企业市场,它增加了许多高级的数据库和Internet功能。     

Visual Basic专家门诊

如何截获执行“命令行”(如：“ping www．sina．com．cn”)后的标准(屏幕)输出?     

Visual Basic专家门诊

问题:在MSChart中如何显示数据点的标签? 解答: 1、显示数据点的标签 with MSChart1.Plot For i=1 To MSChartl. ColumnCount'遍历图表数据网格中的与列关联的标签文本确定数据点标签的位置·SeriesCollection(i). DataPoints.Item(-1) ·DataPointLabel. LocationType=VtChLocationTypeTop 设置标签类型为数据点数值     

Visual Foxpro面向对象编程

ＶｉｓｕａｌＦｏｘｐｒｏ提供了一个具有全功能面向对象工具的集成开发环境，本文介绍了作者在Ｖｉｓｕａｌｆｏｘｐｒｏ应用程序开发实践中的几点体会，并附一实例说明。     

利用Visual Basic的ACTiveX为Visual FoxPro添色

在Visual Foxpro(以下简称VFP)的实际应用中,常常会因为其在界面处理能力上的不足,而令你的程序大打折扣。同出一脉的VisualBasic(以下简称VB)则以它的开发迅速、简捷和强大的图形用户界面开发能力颇受青睐。尤其到了5.0版后更支持创建自己的应用ActiveX部件。本文对此功能在VFP中的具体应用做一介绍,以求拓展一下同行们的思路,从而使你的VFP应用程序也同样能焕然一新。 ActiveX部件是一段可重用的编程代码和数据,它是由用ActiveX技术创建的一个或多个对象     

Visual C++与Compaq Visual Fortran混合编程研究

详细论述了Visual C 与Compaq Visual Fortran混合编程所要解决的问题，并结合实例提出了解决方法，并进而利用函数直接嵌入法和动态链接库调用方法结合实例用Visual C 调用了已有Fortran代码，有效的利用了Fortran遗产代码，避免了资源浪费，节省了编程时间，在工程与科学研究中有着极大的应用价值。     

The Theory and Practice of Coplanar Shadowgram Imaging for Acquiring Visual Hulls of Intricate Objects

Acquiring 3D models of intricate objects (like tree branches, bicycles and insects) is a challenging task due to severe self-occlusions, repeated thin structures, and surface discontinuities. In theory, a shape-from-silhouettes (SFS) approach can overcome these difficulties and reconstruct visual hulls that are close to the actual shapes, regardless of the complexity of the object. In practice, however, SFS is highly sensitive to errors in silhouette contours and the calibration of the imaging system, and has therefore not been used for obtaining accurate shapes with a large number of views. In this work, we present a practical approach to SFS using a novel technique called coplanar shadowgram imaging that allows us to use dozens to even hundreds of views for visual hull reconstruction. A point light source is moved around an object and the shadows (silhouettes) cast onto a single background plane are imaged. We characterize this imaging system in terms of image projection, reconstruction ambiguity, epipolar geometry, and shape and source recovery. The coplanarity of the shadowgrams yields unique geometric properties that are not possible in traditional multi-view camera-based imaging systems. These properties allow us to derive a robust and automatic algorithm to recover the visual hull of an object and the 3D positions of the light source simultaneously, regardless of the complexity of the object. We demonstrate the acquisition of several intricate shapes with severe occlusions and thin structures, using 50 to 120 views. Electronic Supplementary Material  The online version of this article () contains supplementary material, which is available to authorized users. This is an extension and consolidation of our previous work on coplanar shadowgram imaging system (Yamazaki et al. 2007) presented at IEEE International Conference on Computer Vision 2007.     

Visual Basic调用Visual C + + DLL的方法

Visual Baisc开发平台以其简单实用受到广大软件开发人员的青睐,然而在用VB做某些项目时,需要调用某种VB中没有的函数,应该怎么办呢?     

How Ordered Is It? On the Perceptual Orderability of Visual Channels

The design of effective glyphs for visualisation involves a number of different visual encodings. Since spatial position is usually already specified in advance, we must rely on other visual channels to convey additional relationships for multivariate analysis. One such relationship is the apparent order present in the data. This paper presents two crowdsourcing empirical studies that focus on the perceptual evaluation of orderability for visual channels, namely Bertin's retinal variables. The first study investigates the perception of order in a sequence of elements encoded with different visual channels. We found evidence that certain visual channels are perceived as more ordered (for example, value) while others are perceived as less ordered (for example, hue) than the measured order present in the data. As a result, certain visual channels are more/less sensitive to disorder. The second study evaluates how visual orderability affects min and max judgements of elements in the sequence. We found that visual channels that tend to be perceived as ordered, improve the accuracy of identifying these values.     

Visual Basic动画程序设计

本文详细介绍了在Visual Basic中播放常见动画文件的程序设计以及通过动态移动控制或动态切换各种图像产生动画的方法。