基于ARM9的嵌入式视频采集系统设计

以ARM920t内核的嵌入式微处理器S3C2440为硬件核心,以WinCE为嵌入式实时操作系统,选择图像传感器芯片OV9650,设计了一款小体积、低功耗的视频采集系统.硬件设计遵循模块化设计思想,将整个硬件系统设计成微系统核心模块、视频采集模块和外设控制模块3部分.软件设计部分论述了OV9650驱动程序的开发与应用程序的设计,驱动程序开发在Platform Builder中完成,应用程序在EVC可视化开发环境中完成.通过实验,证明了系统设计的正确与合理:视频清晰连续,系统稳定性好.     

基于ARM-Linux远程视频监控系统的设计

以COALL2440开发板为硬件平台, Linux操作系统为软件平台, 并用USB视频摄像头和无线网卡, 通过对系统内核的配置, 底层设备驱动程序的编写和上层应用程序的设计, 构建嵌入式视频采集与无线传输系统. 通过将采集到的视频图像进行远程无线数据传输的方法, 解决了视频图像只能在PC机上进行监控的局限, 使视频图像能
直观地显示在智能移动终端上, 从而提高监控系统的拓展性、 安全性与适用性.     

基于ARM-Linux远程视频监控系统的设计

以COALL2440开发板为硬件平台,Linux操作系统为软件平台,并用USB视频摄像头和无线网卡,通过对系统内核的配置,底层设备驱动程序的编写和上层应用程序的设计,构建嵌入式视频采集与无线传输系统.通过将采集到的视频图像进行远程无线数据传输的方法,解决了视频图像只能在PC机上进行监控的局限,使视频图像能直观地显示在智能移动终端上,从而提高监控系统的拓展性、安全性与适用性.     

网络化的楼宇可视终端系统的设计

为了克服以往模拟监控系统在信号、布线、传输距离方面的局限性及以PC机为用户端的网络监控系统的体积限制,提出了基于嵌入式Linux的网络可视终端系统的解决方案.在电子门侧采用嵌入式Linux平台,利用Video ForLinux内核接口函数,结合USB摄像头来实现单帧和视频连续帧的采集,采用MJPEG标准进行视频图像压缩,通过TCP/IP协议实现网络传输;在用户端用支持嵌入式Linux的彩屏终端系统对视频数据进行接收、解码和显示.该方案使监控系统小型化、低成本化,且图像显示清晰、实时性好.     

基于ARM9的嵌入式无线视频监控小车设计

目的将监控技术和嵌入式技术相结合,实现可移动的无线远程视频监控系统。方法在基于ARM9和linux2.6内核的嵌入式系统平台上控制摄像头采集视频、电机驱动电路以及无线网卡,并配置实现Boa服务器和MJPG-streamer视频服务器;利用CGI实现了客户端浏览器控制小车和摄像头电机的运行。结果实现了一种嵌入式视频监控小车的设计方法。结论该系统可扩展性、实时性、灵活性高,可实现对实时移动视频监控的需求。     

嵌入式图像采集系统中的硬件实现研究

文章设计了独立于PC机平台的视频图像采集、处理系统,是数字视频理论与图像处理理论与嵌入式技术的综合运用,并分析了视频信号采集系统的硬件设计和硬件调试。     

嵌入式网关在远程视频监控中的应用研究

设计并实现了一个基于ARM微处理器的CAN/Ethernet嵌入式网关,并将其应用于远程视频监控系统中.监控前端控制摄像头采集视频数据,压缩之后通过CAN/以太网嵌入式网关实现视频数据和控制信息的远程交互.其硬件系统由集成了CAN控制器的ARM微处理器LPC2294、网卡芯片RTL8019AS以及CAN收发器组成.软件...     

基于S3C4480微处理器视频采集系统的设计

随着嵌入式技术的发展,视频采集成为诸多领域的核心技术。文中对基于ARM7核S3C4480处理器的硬件系统以及UClinux软件应用进行了介绍,并且给出了一种基于S3C4480处理器与嵌入式UClinux操作系统下的视频采集系统的设计方案。     

嵌入式视频系统中VGA接口的设计

在嵌入式视频系统中,为了满足凋试以及用户的需要,对采集到的图像进行显示是不可缺少的,同时系统应能兼容较多的视频接口类型,这显然会增加系统的软、硬件的复杂性.针对上述问题,在基于TMS320DM642的嵌入式图像处理系统中,提出了一种新的VGA视频接口设计方法.将DSP芯片与视频编码芯片SAA7105简单连接,在不增加系统的成本和复杂性的前提下,实现了系统中VGA接口的设计.该方法已成功应用到某虹膜识别系统中.     

视频采集及处理系统平台介绍

介绍基于X86单板嵌入式及DSP两种用于视频图像采集和处理的系统平台。系统可以完成视频快速采集、存储及数据处理等功能应用。文章较详细的介绍了两种系统硬件架构及软件编程的通用方法,并给出两个典型实例。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

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