基于CAMSHIFT算法的视频监控目标跟踪

随着智能监控系统的普及,智能监控技术在银行、城市安防、交通等部门得到的了广泛的应用.CamShift算法是基于监控视频图像颜色特征的目标跟踪算法,这种算法能够快速、准确地实现目标跟踪,鲁棒性能较好.监控视频中所拍摄的视频内容较多且视频拍摄环境较为复杂,因此采用CamShift算法能够有效对视频监控目标建立颜色模型并对其进行准确高效的跟踪.     

实时视频对象识别与计数系统的模型和算法设计

动态视频对象的识别与检测是计算机图像处理领域中的一个前沿课题。该文提出了一种利用实时视频图像识别技术 ,对无规则行进队伍的人员进行检测与统计的系统模型和算法设计。基于颜色模型转换、减影、膨胀、腐蚀、聚类、匹配、跟踪等技术 ,实现了对特定检测区域内运动对象的识别、检测和计数。着重讨论了系统的设计原理和实现方法 ,以及对象运动的物理模型和多目标识别跟踪算法。该系统于1998年开始成功地应用于毛主席纪念堂 ,对每日的瞻仰人数进行实时统计 ,计数误差小于 3% ,系统工作稳定可靠     

基于视频图像处理的机场航空器冲突检测

 针对场面监视雷达成本较高、不适用于流量较小的中小机场等问题, 采用多摄像机对机场场面航空器进行动态跟踪, 采用图像边缘检测和形态学处理方法对目标进行识别, 跟踪和提取航空器的飞行轨迹并分析其位置和速度参数, 提出了运动目标跟踪算法和基于DCPA 和TCPA 的滑行冲突检测模型, 开发了基于视频图像处理的机场航空器冲突检测原型系统, 并应用于西南某通航机场。实验表明, 视频图像处理技术和冲突检测模型可用于中小机场的航空器识别和冲突检测, 提高机场安全运行水平。     

基于Gabor小波和颜色模型的阴影检测算法

在视频处理中,阴影的存在会严重影响对目标的跟踪和识别.为了有效地检测视频序列中的阴影,文中提出了一种基于Gabor小波和颜色模型的阴影检测算法.首先,建立背景的混合高斯分布模型和阴影颜色模型,通过差分法提取前景区域并结合Gabor小波纹理特征分析找出潜在的阴影点;然后通过阴影颜色模型对这些潜在的阴影点进行颜色分析;最后通过后续处理,找出真正的阴影区域.实验结果表明,文中算法具有较好的阴影检测效果.     

城市视频监控智能分析方法探讨

视频监控在城市安全防范中能起到关键作用,虽然监控摄像头越来越先进,但目前仍需大量的人工操作,针对这一问题,提出智能分析方法,利用目标检测模型对感兴趣目标进行检测追踪、将感兴趣事件存储和对感兴趣目标进行识别。智能视频监控的方法能减轻监控操作员工作量,减少视频存储量,通过对感兴趣目标人物的分析和追踪实现准确打击犯罪,从而提升视频监控的效率,保护国家和人民群众的生命财产安全。     

动态场景中运动目标检测与跟踪

为了在静态和动态场景中均能实现对运动目标的检测与跟踪,提出了基于运动检测和视频跟踪相结合的视频监控方法. 建立四参数运动仿射模型来描述全局运动,采用块匹配法对其进行参数估计;采用基于全局运动补偿的Horn-Schunck算法检测出运动目标;使用卡尔曼滤波对运动目标的质心位置、宽度和高度进行跟踪. 实验结果表明,该方法能够有效地对静态和动态场景中运动目标进行检测与跟踪.     

基于分水岭分割和颜色深度特征的眼球图像识别算法研究

为了提高眼球手术的成功率,提出了基于眼球图像分割和深度学习颜色特征的眼球图像识别算法.联合图像分割技术和深度学习技术,建立眼球精准识别机制.首先,采集眼球手术视频和图像,并结合阈值分割、分水岭分割和颜色区域分割,实现眼球目标的分割;然后,基于卷积神经网络,运用Python和pytorch的开源框架,开发深度神经网络识别模型,并结合大数据中医诊疗经验,构建专家检测系统,以准确定位眼球;最后,根据用户软件需求,开发出具有图像采集、视频采集、电子信息履历保存等应用功能的客户端软件.实验测试结果显示:算法有利于眼球图像分割系统的落地,为智能眼球图像分割系统设备提供了算法和软件参考.     

跨道监控系统设计与应用

设计了一套基于视频的机动车跨道违章监测系统,系统的硬件平台由工控机,摄像机组成.首先由平均算法得到良好的动态背景图像,并由Hough变换法提取车道线;在车辆检测过程中提出了背景差法与边缘提取法相结合,车道线辅助识别的两次目标轮廓提取算法,从而获得完整准确的运动目标轮廓;在违章判别中提出了简易准确的跨道违章判别算法;最后使用均值漂移算法对运动车辆进行跟踪,并结合卡尔曼滤波器预测车辆在下一帧的位置.通过实际道路测试,该系统具有一定的实时性、准确性和智能性,可应用于智能交通监控领域.     

基于kinect摄像机的多运动目标实时跟踪

多运动目标跟踪是视频监控中的关键问题,在目标相互运动发生遮挡时,采用二维摄像头监控容易丢失信息而造成跟踪失败.本文采用kinect摄像机获取目标的RGB图像及深度图像,并分别获取基于RGB图像信息的目标颜色模型和基于深度信息的目标三维空间模型,在视频帧间将颜色、空间模型分别匹配得到目标帧间匹配度,通过Mahalanobis距离算法实现多目标匹配,从而得到多目标识别跟踪结果.实验表明,在RGB-D数据集及拍摄的视频序列上均取得了较好的跟踪结果,实现了kinect三维视觉下的实时多目标的跟踪.     

基于深度学习的智能检测路径

<正>当前，智能检测系统的核心作用是及时准确地识别图像或视频中的各类信息，进而获取目标的种类和位置信息。近年来，随着深度学习技术的不断突破，基于深度学习的目标检测技术在智能检测场景下达到了更快的识别速度和更高的准确率。基于此，本文结合深度学习，进一步探讨了智能检测手段的理论依据。     

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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