彩色汽车牌照定位方法

汽车牌照的定位是牌照识别的第一步，定位的准确与否将后续操作起关键性的作用。在模式识别领域中，希望通过一种方法就完成一项实际工作是不可能的，必须要考虑多种方法融合的策略，提出了一种基于多方法的车牌定位策略，首先利用颜色信息对输入图像进行彩色粗分割，得到了颜色为车牌照的一些区域，然后将分割结果中的伪目标区域（即除了车牌照区域外的其他区域）分为两类（一类是与汽车牌照颜色相近的背景，一类是可能和牌照颜色相近的汽车外壳），分别进行处理，最终利用投影法得到准确的车牌位置，实验结果表明该方法效果较好。     

电视图像噪声测量分析评价仪

人们普遍采用CCIR第500-Ⅰ号建议书推荐的主观评价法确定电视图像质量的好坏。本文介绍一种电视图像噪声测量分析评价仪,并对其系统设计及试验作了详细论述。文章着重介绍了针对活动图像噪声处理难点采用的噪声移动处理法以及根据人的主观评价模型系统采用的电视图像噪声的自相关分析、功率频谱估计等方法。该系统外围接口简单。上述全部功能均在IBM-PC/XT上编程实现。     

彩显管用电子枪系统的设计考虑

本文讨论了影响彩管电子枪分辨率的主要因素，分析了高分辨率电子枪设计思路，并对历年来各大ＣＲＴ公司及相关研究机构开发的主要类型的电子枪作了介绍。     

A MATHEMATICAL MODEL OF A CLASS OF AUTOCATALYTIC CHEMICAL REACTION

Ｂｙｆｏｌｏｗｉｎｇｍｅｃｈａｎｉｓｍ：ＡａαＸ，ＣｃαＹ，Ｂ＋ＸｂαＹ＋Ｄ，Ｘ＋Ｙｅα３Ｙ，ＹｆαＦ，ＸλαＦ，ａｒｔｉｃｌｅ［１］ｏｂｔａｉｎｅｄｔｈｅｆｏｌｏｗｉｎｇｓｙｓｔｅｍ：ｘ＝ａ－ｂｘ－ｅｘｙ２－λｘ，ｙ＝ｂｘ＋ｅｘｙ２－ｆｙ＋ｃ．（１...     

用光学方法实现多灰度级图像的区域分割

利用光学中的阶跃滤波器实现对多灰度级图像的区域分割，并从理论上对用阶跃滤波器处理具有硬边界和软边界的多灰度级图像及最终实现多灰度级图像的区域分割进行了讨论。当多灰度级图像存在灰度不连续变化(硬边界)和有转折变化(尖点)时，使用阶跃滤波器都会在这样的区域内呈现边界增强。     

模型基图像编码

本文扼要综述模型基图像编码中两类方法(语义基和物体基)的最近成果。此外,还介绍了两种新的可视通信系统(虚拟空间会议电视和电视呈现系统)之构想。     

运动图像实时传输系统的设计与实现

本文完成了运动图像实时传输系统的设计，并对其核心部分视频编码器和视频解码器进行了详细的分析和设计．实现了运动图像的实时窄带传输。     

彩色显像管的排气工艺

叙述了彩色显像管的排气工艺及制订排气工艺规范的考虑要点和实施方法。还叙述了在彩管厂投产初期,排气工序中影响成品率比较突出的几个问题及其解决方法。特别适用于新建的彩管生产线和调整工艺规范。     

A Schrodinger formulation research for light beam propagation through the media of complex refractive index

The Helmhotz equation of light beam propagating through a medium of complex refractive index is reduced to the axial-coordinate-dependent Schr?dinger equation of complex potential. The new bra vector, the new expectation value of a dynamical variable and the extended Heisenberg picture are defined by the inverse of the evolution operator instead of its Hermitian adjoint, and the complex beam propagation parameters defined in terms of the new expectation value, the complex ABCD law and the ABCD formulation of the Huygens' integral are discussed in terms of quantum mechanics. It is shown that the evolution equations of the complex beam propagation parameters are the same as those of the beam propagation parameters of beam propagating through a medium of real refractive index. The research on an optical system of the conservative complex beam quality factor shows that the complex ABCD law holds, the evolution of its coordinate operator and the momentum operator is linear, and the Huygens' integral is of the ABCD formulation.     

Wireless provision of true VoD services and fast access to Internet

The evolution of digital compression techniques has made possible the provision of full‐motion video services through networking infrastructures of sufficient bandwidth. This paper presents a wireless broadband network, which is capable of providing true interactive VoD services (with full VCR functions) and fast access to Internet to a number of simultaneous clients. The network is based on frequency hopping spread spectrum (FHSS) technology operating in the 2.4 GHz frequency band. The paper describes the system architecture and configuration adopted in a real environment trial and elaborates on the provided picture quality in a multi‐client environment. Copyright © 2002 John Wiley & Sons, Ltd.