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1.
潘亚男  白帆 《数字社区&智能家居》2009,5(10):8026-8027,8030
视频序列中的运动目标检测是计算机视觉、视频监控等领域的关键问题。背景差分法是目前运动目标检测中最常用的一种方法.而构造一个自适应更新的背景模型是背景差分法的核心。利用运动目标图像变化比背景图像变化要快的特点,提出了一种改进的构建并实时更新背景图像的方法。实验表明,该方法计算量小、实时性好、并且能够确保较好的检测精度。  相似文献   

2.
为了从监控视频中检测出较高质量的运动物体,文章提出了一种基于帧间差分和背景差分相结合的运动目标的检测方法,并且采用像素级和帧级背景更新相配合的一种背景更新策略。算法求取各像素点处的最大概率灰度,从而提取出连续视频的背景图像;相邻帧则利用帧间差分法以及背景差分法得到两幅运动区域图像;将两幅运动区域图像相与,提取出较为准确的运动目标。实验证明,该算法对光线的变化鲁棒性较高,运算速度较快,且能够及时的响应监控视频的实时变化,提高运动目标的检测质量。  相似文献   

3.
研究了目标检测方法。针对传统背景更新方法易受噪声干扰、算法执行速度慢等弊端,对背景差分法予以改进,提出一种基于自适应图像分块和结构相似性(SSIM)的运动目标检测方法。根据视频最初几帧得到初始背景模型,再对视频后续的每帧进行自适应分块处理,利用相邻帧对应分块的结构相似性计算局部更新率,建立背景模型,将背景与当前帧差分即得到运动目标。实验结果表明,与传统的背景差分法相比,改进后的方法具有更好的检测效果。  相似文献   

4.
运动目标检测是视频监控和目标跟踪研究的前提,目标提取是否准确,将直接影响到后期目标跟踪和处理的效果。该文在背景减除法和五帧差分法的基础上,提出了将两种算法相结合的方法,对视频序列中的运动目标进行检测。首先采用Surendra背景减除法建立背景模型,并通过迭代法计算出动态阈值,完成背景更新,然后将检测出的运动目标区域与五帧差分法得到的目标轮廓图形进行逻辑"或"操作,取得比较完整的运动目标,最后采用连通性检测和孔洞填充方法综合得到运动区域图像。通过MATLAB验证和量化评估表明,该方法能准确地检测出运动目标,同时在识别率和误检率方面也得到了较好结果。  相似文献   

5.
基于分块分类的智能视频监控背景更新算法   总被引:1,自引:0,他引:1  
针对传统智能视频监控中背景更新算法计算量大、对光照变化敏感等问题,提出了一种基于分块分类的背景更新算法.首先,根据视频序列获得初始的背景参考图像,采用背景差分法得到当前帧的差分图像.然后,将差分图像采用分块处理,按照子块的均值特征对各子块图像进行前景块和背景块的分类.最后,根据分类情况采用不同的背景更新策略,实现背景的实时更新.该算法以块为操作对象,相比单个像素处理时的计算量更小,运算速度更快.实验结果表明,新算法能较好地适应光照变化,背景更新效果较好.  相似文献   

6.
文章针对视频图像的特点,提出一种基于背景差分法的运动目标区域检测算法。该算法利用当前图像与背景图像作差分,并采用一阶Kalman滤波实现动态背景图像的更新,接着采用自适应阈值法进行运动区域分割,经过滤波处理即可得到运动目标区域。实验结果表明所提出的算法具有较理想的效果。  相似文献   

7.
为了提高煤矿井下监控视频的目标识别准确率,对运动目标进行有效跟踪,将小波变换和背景差分法相结合,对Camshift算法进行改进,提出了适用于煤矿井下视频多目标轨迹跟踪算法。首先采用小波三层变换对视频图像进行去噪处理,得到低频图像。然后再进行背景差分运算,检测出运动目标。最后采用Camshift算法对运动目标进行跟踪处理。实验结果表明,改进的Camshift算法减少了原始Camshift算法在初始候选目标时的随机性,提高了目标检测和跟踪的准确率,为煤矿的安全生产提供了保证。  相似文献   

8.
视频监控中一种完整提取运动目标的检测算法   总被引:2,自引:0,他引:2  
提出一种视频监控中完整、精确提取运动目标前景的检测算法.首先对彩色图像建立混合高斯模型,由背景差分法得到基本准确的前景图像;然后和对称差分法图像综合,得到完整可靠的运动目标图像;再利用亮度信息消除运动目标阴影;最后利用形态学滤波和连通区域面积检测进行后处理.实验结果表明,该算法检测的运动目标前景信息完整准确,对固定场景下的视频监控系统具有一定实用价值.  相似文献   

9.
《软件工程师》2015,(8):12-14
本文提出一种基于改进蜂群算法的视频目标检测方法,首先对两幅图像进行优化获得最大互信息值,进而获得最佳空间匹配参数,最后通过三帧差分法检测出目标。该算法相对传统算法,能够抑制背景残留噪声,而且不需要对图像进行预处理、特征选取以及背景更新,降低了算法复杂度。通过与传统蜂群算法的结果对比,证明了改进算法的有效性和可靠性。  相似文献   

10.
针对传统远程监控系统功能不够全面、性能不够完善等不足,采用ARM处理器和GPRS模块,结合多种传感器,设计了一种高性能远程监控系统。以ARM处理器为数据、视频服务器,实现远程网页监控;采用人体红外传感器感应人体入侵,温湿度传感器采集环境数据,图像传感器采集图像视频数据,GPRS模块负责短信交互与彩信报警。此外,利用背景差分法和改进的Lucy-Richardson(LR)算法对模糊图像进行复原处理。测试结果表明:该系统具有低成本、高性能、功能全面等优点。  相似文献   

11.
Abstract This paper describes an approach to the design of interactive multimedia materials being developed in a European Community project. The developmental process is seen as a dialogue between technologists and teachers. This dialogue is often problematic because of the differences in training, experience and culture between them. Conditions needed for fruitful dialogue are described and the generic model for learning design used in the project is explained.  相似文献   

12.
European Community policy and the market   总被引:1,自引:0,他引:1  
Abstract This paper starts with some reflections on the policy considerations and priorities which are shaping European Commission (EC) research programmes. Then it attempts to position the current projects which seek to capitalise on information and communications technologies for learning in relation to these priorities and the apparent realities of the marketplace. It concludes that while there are grounds to be optimistic about the contribution EC programmes can make to the efficiency and standard of education and training, they are still too technology driven.  相似文献   

13.
融合集成方法已经广泛应用在模式识别领域,然而一些基分类器实时性能稳定性较差,导致多分类器融合性能差,针对上述问题本文提出了一种新的基于多分类器的子融合集成分类器系统。该方法考虑在度量层融合层次之上通过对各类基多分类器进行动态选择,票数最多的类别作为融合系统中对特征向量识别的类别,构成一种新的自适应子融合集成分类器方法。实验表明,该方法比传统的分类器以及分类融合方法识别准确率明显更高,具有更好的鲁棒性。  相似文献   

14.
Development of software intensive systems (systems) in practice involves a series of self-contained phases for the lifecycle of a system. Semantic and temporal gaps, which occur among phases and among developer disciplines within and across phases, hinder the ongoing development of a system because of the interdependencies among phases and among disciplines. Such gaps are magnified among systems that are developed at different times by different development teams, which may limit reuse of artifacts of systems development and interoperability among the systems. This article discusses such gaps and a systems development process for avoiding them.  相似文献   

15.
This paper presents control charts models and the necessary simulation software for the location of economic values of the control parameters. The simulation program is written in FORTRAN, requires only 10K of main storage, and can run on most mini and micro computers. Two models are presented - one describes the process when it is operating at full capacity and the other when the process is operating under capacity. The models allow the product quality to deteriorate to a further level before an existing out-of-control state is detected, and they can also be used in situations where no prior knowledge exists of the out-of-control causes and the resulting proportion defectives.  相似文献   

16.
Going through a few examples of robot artists who are recognized worldwide, we try to analyze the deepest meaning of what is called “robot art” and the related art field definition. We also try to highlight its well-marked borders, such as kinetic sculptures, kinetic art, cyber art, and cyberpunk. A brief excursion into the importance of the context, the message, and its semiotics is also provided, case by case, together with a few hints on the history of this discipline in the light of an artistic perspective. Therefore, the aim of this article is to try to summarize the main characteristics that might classify robot art as a unique and innovative discipline, and to track down some of the principles by which a robotic artifact can or cannot be considered an art piece in terms of social, cultural, and strictly artistic interest. This work was presented in part at the 13th International Symposium on Artificial Life and Robotics, Oita, Japan, January 31–February 2, 2008  相似文献   

17.
Although there are many arguments that logic is an appropriate tool for artificial intelligence, there has been a perceived problem with the monotonicity of classical logic. This paper elaborates on the idea that reasoning should be viewed as theory formation where logic tells us the consequences of our assumptions. The two activities of predicting what is expected to be true and explaining observations are considered in a simple theory formation framework. Properties of each activity are discussed, along with a number of proposals as to what should be predicted or accepted as reasonable explanations. An architecture is proposed to combine explanation and prediction into one coherent framework. Algorithms used to implement the system as well as examples from a running implementation are given.  相似文献   

18.
This paper provides the author's personal views and perspectives on software process improvement. Starting with his first work on technology assessment in IBM over 20 years ago, Watts Humphrey describes the process improvement work he has been directly involved in. This includes the development of the early process assessment methods, the original design of the CMM, and the introduction of the Personal Software Process (PSP)SM and Team Software Process (TSP){SM}. In addition to describing the original motivation for this work, the author also reviews many of the problems he and his associates encountered and why they solved them the way they did. He also comments on the outstanding issues and likely directions for future work. Finally, this work has built on the experiences and contributions of many people. Mr. Humphrey only describes work that he was personally involved in and he names many of the key contributors. However, so many people have been involved in this work that a full list of the important participants would be impractical.  相似文献   

19.
基于复小波噪声方差显著修正的SAR图像去噪   总被引:4,自引:1,他引:3  
提出了一种基于复小波域统计建模与噪声方差估计显著性修正相结合的合成孔径雷达(Synthetic Aperture Radar,SAR)图像斑点噪声滤波方法。该方法首先通过对数变换将乘性噪声模型转化为加性噪声模型,然后对变换后的图像进行双树复小波变换(Dualtree Complex Wavelet Transform,DCWT),并对复数小波系数的统计分布进行建模。在此先验分布的基础上,通过运用贝叶斯估计方法从含噪系数中恢复原始系数,达到滤除噪声的目的。实验结果表明该方法在去除噪声的同时保留了图像的细节信息,取得了很好的降噪效果。  相似文献   

20.
蒙古语言是中国蒙古族使用的通用语言,由于蒙古文区别于其他文字的书写方式和其自身变形机制等特点,在很多通用的文字处理引擎中都不被支持。在嵌入式产品开发与应用领域中Linux加QTE已经成为流行方式。该文给出了一种在QTE环境上实现基于标准Unicode的蒙古文点阵显示和变形算法, 并自定义了支持蒙古文的QTE组件,扩展了QTE功能,为在Linux加QTE方式的嵌入式体系结构中处理蒙古文提供了一种解决方法。  相似文献   

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