基于特征融合的人体行为识别

为克服单个行为表达方法有效性上的不足,提出了一种基于多特征融合和支持向量机(SVM)的人体行为识别(HAR)方法。首先,利用背景差分提取运动显著区域;然后提取运动显著区域的剪影直方图和光流直方图,并采取一定的融合策略,构建融合特征结合SVM识别人体行为。实验以广泛使用的公开数据集Weizmann为研究对象,正确识别率达到99.8%以上。结果表明,提出的特征融合及识别方法能有效地对人体行为进行识别;而且,由于规避了比较耗时的序列匹配操作,减少了计算量。     

一种基于全局和局部特征的LBP算法应用

提出一种基于全局和局部特征的LBP人脸识别算法。首先将人脸图像进行LBP提取全局直方图特征,再将图像分块,提取每块的LBP局部直方图特征,最后将全局和局部特征按一定的顺序相结合作为图像的总体特征。然后通过RBF神经网络进行分类识别。在ORL人脸库上的实验结果表明,该算法具有较高的识别率。     

基于多特征融合的人体运动姿态智能识别算法研究

针对人体运动姿态复杂,而基于单特征的运动姿态识别算法难以对人体姿态进行准确识别且效率较低等问题,文中提出了一种基于多特征融合的相关智能识别算法。该算法利用图像去噪等方法对采集到的原始图像数据进行预处理,以突出图像中的关键信息。同时通过OpenCV提取数据中的Hu不变矩等特征,并利用神经网络算法将提取到的特征加以融合。采用SVM建立分类模型,进而实现对人体运动姿态的智能识别。两项实验结果说明,所提算法能在保证处理效率的前提下实现对人体姿态的精准识别,准确率可达93%以上。     

基于多特征融合的运动对象识别算法

为提高视频检索的准确率,提出了一种基于多特征融合的视频运动对象识别算法。该算法首先使用基于背景帧构造及关键帧截取的方法提取视频中的运动对象的区域;然后分别提取运动对象的局部特征SURF描述子和全局特征如颜色直方图、边缘直方图等,并使两者融合为统一的特征向量;最后使用支持向量机对特征进行学习和识别,用以识别视频对象。实验证明该算法有效地提高了视频中运动对象识别的准确率。     

掌纹主线和纹理特征融合的识别方法

针对掌纹单特征提取方法提取的掌纹特征信息较为单一以及近年来掌纹特征融合方法在纹理特征提取过程计算量偏大和没有将掌纹感兴趣区域(ROI)的多种特征进行融合的缺陷,本文提出了一种掌纹主线和纹理特征融合的方法。利用数学形态学和基于统一模式的LBP算子分别提取增强的掌纹ROI的主线特征和纹理特征信息,再利用融合规则将两种特征信息进行融合。对各特征图进行直方图统计得到特征向量后输入SVM分类识别,再将识别率最高的特征图进行分块直方图统计,将所得特征向量输入到SVM进行分类识别并与其他方法作对比。     

基于局部显著性特征的人体检测方法

通过分析人体轮廓的性质,结合Sobel算子、HOG和LBP算子,提出一种基于脊模型的局部显著性特征提取方法,该特征将人体轮廓的方向特性和结构特性有机结合,属于一种多属性融合的人体描述方法。在人体梯度空间中,通过使用改进的LBP算子和简化的梯度方向直方图进行特征的提取、训练和识别。实验表明,使用该特征可有效的减少计算复杂度,提高行人检测速度;但与HOG相比,由于描述人体的特征维数较少,因此人体识别的检测率还有待提高。     

基于支持向量机的步态识别算法研究

为了准确快速地进行运动人体的步态识别,提出了一种基于主分量分析(PCA)和统一Hu矩融合的步态识别算法。将人体髋关节以下作为感兴趣区域,对图像序列中运动人体的感兴趣区域进行了分割,并提取主分量外形特征,同时计算感兴趣区域的统一Hu不变矩特征,将二者结合,构成步态序列的特征空间,采用支持向量机(SVM)分类器进行分类识别,通过MATLAB仿真实验验证了算法的有效性。实验结果表明,该算法识别速度快,具有较高的识别率。     

基于HOGv-CLBP特征融合和ELM的交通标志识别

针对交通标志识别识别率低和时间复杂度大的问题 ,本文提出一种HOGv-CLBP特征融合和极限学习机的交通标志识别算法。首先通过描述交通 标志图像边缘信息的方向梯度直方图(HOG)特征,与能够 表示标志图像内部纹理信息的局部二值模式(LBP)特征融合得到降维后形成一种HOGv-CLB P有效特征, 然后利用ELM进行交通标志训练和分类。实验结果表明,该算法不仅提高了交通标志的识别 率,而且降低了时间复杂度,增强了系统鲁棒性。     

基于特征融合的红外目标跟踪方法

为了能够对红外目标实现稳健跟踪,提出一种特征融合算法,将目标的LBP纹理特征和灰度特征空间融合,构造了由基于区域置信度及空间距离加权的LBP特征直方图,以及灰度加权直方图联合表示的目标模型。以均值偏移算法为跟踪框架,在当前帧中迭代搜索目标位置。实验证明该方法对于目标和背景灰度相似以及目标被部分遮挡时的跟踪是有效和稳健的。     

多特征融合的自适应加权采样上下文感知相关滤波跟踪算法

针对传统相关滤波器使用特征单一、背景信息不足等缺点,提出一种多特征融合的自适应加权采样的上下文感知相关滤波算法.首先,对于灰度图像序列,采用方向梯度直方图(FHOG)特征、局部二值模式(LBP)特征以及灰度特征相融合;对于彩色图像序列,则采用方向梯度直方图(FHOG)特征、局部二值模式(LBP)特征以及颜色(CN)特征...     

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.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

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.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.