DICOM格式文件Windows下显示技术研究

首先介绍了DICOM文件格式和BMP文件格式,在此基础上介绍了在windows上如何转换DICOM格式到BMP格式,针对转换后位图显示效果不令人满意,提出了一种在转化过程中利用直方图均衡化的转换方法,从显示的结果来看,该方法转换后的图像比一般方法要清晰的多,便于观察。     

利用VTK实现DICOM医学图像三维重建

利用医学可视化技术可以将二维断层序列图像重建为三维虚拟实体,基于这个模型可以精确地获取病变区的大小、位置和形状,极大地提高了诊断的直观性与交互性.VTK是目前国际上通用的科学计算可视化工具包,DICOM文件为医学图像的专用传输和存储格式.在Visual C 6.0平台下,本文借助VTK类库,采用体绘制方法实现了DICOM医学序列图像的三维重建,并给出了程序运行结果.     

浅谈FFmbc及其在广电行业中的应用

在电视节目制作中,经常需要将各种各样的流媒体文件转换为广电行业使用的格式,使用非编软件进行转码是常用的一种方法,而本文介绍另一种更便捷实用的方法,即通过转码软件FFmbc,将流媒体文件转码为广播级视频服务器支持的视音频格式.经测试,转码产生的mxf格式文件,在Mediadeck视频服务器上成功播出.     

AVI文件格式及其应用研究

AVI文件是Windows操作系统下最常用的流媒体文件格式之一,了解AVI文件格式是正确使用AVI文件的基础,以一个具体的AVI文件的二进制码为例,详细解释和研究AVI文件的各个字段的具体含义,并指出AVI1文件与AVI2文件格式的区别,在此基础上,可以对AVI文件进行各种编程操作.给出使用VFW(Video For Windows)用Visual C 编程语言从AVI2文件中获取视频帧,转换为BMP图像,加以显示并存储为位图文件的编程方法.     

基于BMP图像的LCD点阵数据提取实现

BMP文件采用位映像的方式存储和显示图像,也是一种常见的图像文件格式,在实际计算机系统中有着广泛的应用,因此有着丰富的位图资源可供选择,是许多图形或界面系统开发人员需要经常使用的资源。从介绍BMP文件的格式出发,阐述了如何从BMP文件中提取和转换图像点阵数据,以供LCD等点阵式显示系统直接显示,从而为系统开发人员提供了一种简单实用的图像数据提取工具。     

DICOM医学序列图像数据读取及回放

结合实际工程中读取DICOM医学序列图像的要点难点,较详细介绍了DICOM数据元素的基本定义,着重阐述了读取数据中一些需注意的细节。针对DICOM文件格式的十六进制字符存储方式,采用C 语言的有关文件函数进行读取,具体说明了实现的算法流程。针对序列图像的回放显示存在帧之间时间间隔的精确定时这一技术难点,本文着重对其进行了分析阐述。     

一种使用调色板的图像颜色量化设计

分析了流媒体技术和数字视频信号处理的过程,详细讨论了常用的数字图像格式、使用调色板的图像颜色量化方法,仿真实验表明运用这种方法的图像质量有所提高.     

Premiere中常用12种图像文件格式简介

1 GIF格式 GIF格式(图形交换格式)形成一种压缩的8位图像文件,这种格式的文件目前多用于网络传输,它可以指定透明的区域,以使图像与页背景很好地融为一体.GIF图像可以随着它下载的过程从模糊到清晰逐渐演变显示在屏幕上.Amimated GIF(动画GIF)图像可以使网页生动活泼,上网的人肯定已经有所体会.利用GIF动画程序,把一系列不同的GIF图像集合在一个文件里,这种文件可以和普通GIF文件一样插入网页中,GIF格式的不足之处在于它只能处理256色,不能用于存储真彩色图像.     

WPS文件与Word文件之间的相互转换

0　引言市场上出售的能够进行文字处理的应用软件有很多种 ,但我们常用的文字处理软件是ＷＰＳ和Ｗｏｒｄ。在ＷＰＳ下编辑的文件可以转换成Ｗｏｒｄ格式的文件 ,同样 ,在Ｗｏｒｄ下编辑的文件可以转换成ＷＰＳ格式的文件 ,即 :同一个文件的内容可以在ＷＰＳ和Ｗｏｒｄ之间任意转换 ,这种转换方式在各处的系统中都已提供给用户 ,大多用户对这一转换方法都已会用 ,但怎样才能更快更完整地将文件转换成相应的格式呢 ?下面简单介绍几种方法 ,供读者参考。1　ＵＣＤＯＳ支持的ＷＰＳ格式文件转换成Ｗｏｒｄ格式文件从ＵＣＤＯＳ支持的ＷＰＳ格式…     

基于视频加深度格式的立体视频技术分析

对现有视频加深度格式的立体视频进行了概括分析,简要介绍视频加深度的技术要点,即深度图像的获取、深度图像的压缩编码,以及图像的合成和质量的评价。同时提出了目前该格式存在的一些技术问题。该项技术尽管使现有深度提取技术有了很大进步,但建立精确的深度图仍然比较昂贵和困难。因此,如何获取高精度的深度图是该格式未来发展的关键,针对深度图像的压缩编码方案也需要进一步研究。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks