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1.
基于改进型脉冲耦合神经网络的图像增强   总被引:1,自引:0,他引:1  
提出一种利用区域面积调节脉冲耦合神经网络神经元的脉冲发放值的计算方法,对带噪声的模糊图像进行图像增强,在消除了噪声影响的同时,提高了边缘提取的自适应性和准确性。编程实验表明,该算法效果明显。  相似文献   

2.
一种用PCNN进行图像边缘检测的新方法   总被引:5,自引:1,他引:5  
文章提出了如何用一种根据动物大脑视觉皮层同步脉冲发放现象提出的人工神经网络---脉冲耦合神经网络(PCNN—PulseCoupledNeuralNetwork)进行二值图像边缘检测的新方法。计算机仿真结果表明,使用PCNN可有效地提取被噪声污染的二值图像的边缘。对于256级的灰度图像,可先用PCNN将原始的256级灰度图像分割为二值图像,接着再用该算法进行边缘检测。  相似文献   

3.
提出一种利用区域面积调节脉冲耦合神经网络神经元的脉冲发放值的计算方法,对带脉冲噪声的图像进行图像分割,在消除噪声影响的同时,提高了图像分割的自适应性和准确性.实验表明,该算法效果明显.  相似文献   

4.
针对脉冲神经网络图像分割中的脉冲编码问题,基于Time-to-First-Spike编码策略提出2种编码方式:线性编码和非线性编码。线性编码方法采用从图像像素值到神经元脉冲发放时间的线性函数对应关系,而非线性编码方法采用Sigmoid函数的对应关系。应用2种方法对图像进行分割,实验结果表明,非线性编码方法的分割结果优于线性编码方法,分割图像具有更大的香农熵值,并且非线性编码方法在图像分割时具有更大的取值区间,更容易对参数进行选择,取得最佳的图像分割结果。  相似文献   

5.
图像边缘是图像分析和识别的基础,图像边缘信息的准确性和完整性对后续图像分析和识别有重要影响。为实现图像边缘有效提取,提出一种利用数据场和图像欧氏距离的图像边缘提取方法。首先,该方法利用数据场理论构建图像数据场,实现图像灰度值特征空间到数据场势值空间的转换。然后,在对图像数据场的势值计算时引入图像欧氏距离,利用图像区域欧氏距离扩大像素差异,抑制微小细节和噪声,得到"背景"和"目标"相对分离的势值图。最后,用改进Canny算法对势值图进行边缘提取。实验表明,用本文方法可以有效提高边缘提取的准确性,减少伪边缘,抑制冗余细节和噪声。  相似文献   

6.
本文利用Unit-Linking PCNN模型结合最大交叉熵准则将医学图像分割为二值图像,然后将亮区(背景)和暗区(目标)的点火二值图异或,点火脉冲依据目标的形状同步传播,从而迅速提取目标边缘。实验结果表明,该方法有效地提取了图像边缘特征。与经典边缘检测算子相比,结果更加清晰完整,是一种有效的医学图像边缘检测方法。  相似文献   

7.
基于PCNN的灰度图像边缘检测方法   总被引:5,自引:0,他引:5  
脉冲耦合神经网络(PCNN)最初由Eckhorn根据猫大脑中视觉皮层神经元的同步脉冲(SynchronousBurst)现象而提出。由于具有一系列良好的特性,PCNN在图像处理、模式识别等领域获得了广泛的应用。文献[6]根据PCNN的传播特性提出了一种利用PCNN检测二值图像边缘的有效方法,但这种方法并不能直接用于对灰度图像的边缘进行检测。由于实际处理的图像大部分为灰度图像,因而其方法的适用性是很有限的。该文提出了一种基于PCNN的灰度图像边缘检测方法,从而直接对256色灰度图像的边缘进行提取,具有较好的适用性。实验结果表明该方法是有效的。  相似文献   

8.
为了准确检测出模糊边缘的位置 ,对用小尺度滤波器检测模糊边缘时噪声影响检测效果的原因进行了分析 ,依据这些噪声点在模糊边缘附近的统计分布规律 ,提出了一种用于图像锐化的阈值计算方法 ,算法自适应地计算图像不同区域对应的图像锐化阈值 ,并用这个值来锐化模糊边缘图像 ,实现对模糊边缘的准确提取。实验结果证明该算法能有效去除模糊边界处的干扰点 ,明显改进了小尺度滤波器提取模糊边缘的性能  相似文献   

9.
主要运用相关系数,通过对原始图像进行加躁再去噪,计算出用传统的滤波方法如均值滤波、中值滤波和维纳滤波分别对有噪声的图像进行去噪处理后,去噪图像与原始图像的相关系数,验证了去除高斯噪声用一次维纳滤波比较理想;去除椒盐噪声使用中值滤波效果较好。并在第三部分给出了对加噪的图像先进行去噪处理,再用CNN进行边缘提取的结果和对加躁图像先用cNN进行边缘提取再去噪的结果,并将这两种结果与原始图像提取边缘的结果进行比较和观察,得出以下结论:为了避免由于噪声引起的失真对图像真实信息的影响,在进行图像边缘提取之前必须先进行去噪处理再进行边缘提取。  相似文献   

10.
基于PCNN的二值图像细化新方法   总被引:1,自引:1,他引:1  
脉冲耦合神经网络(PCNN—Pulse Coupled Neural Network)是一种根据动物大脑视觉皮层同步脉冲发放现象提出的人工神经网络。该文首次提出了如何用PCNN的脉冲传播特性进行二值图像细化的新方法。计算机仿真结果表明,使用PCNN可自然而迅速地自动对各种形状的二值图像进行细化,提取其骨架。该文的研究进一步拓宽了有生物视觉依据的PCNN在图像处理方面的应用范围。  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.
《计算机科学》2007,34(4):148-148
Recent years have seen rapid advances in various grid-related technologies, middleware, and applications. The GCC conference has become one of the largest scientific events worldwide in grid and cooperative computing. The 6th international conference on grid and cooperative computing (GCC2007) Sponsored by China Computer Federation (CCF),Institute of Computing Technology, Chinese Academy of Sciences (ICT) and Xinjiang University ,and in Cooperation with IEEE Computer Soceity ,is to be held from August 16 to 18, 2007 in Urumchi, Xinjiang, China.  相似文献   

18.
为了设计一种具有低成本、低功耗、易操作、功能强且可靠性高的煤矿井下安全分站,针对煤矿安全生产实际,文章提出了采用MCS-51系列单片机为核心、具有CAN总线通信接口的煤矿井下安全监控分站的设计方案;首先给出煤矿井下安全监控分站的整体构架设计,然后着重阐述模拟量输入信号处理系统的设计过程,最后说明单片机最小系统及其键盘、显示、报警、通信等各个组成部分的设计;为验证设计方案的可行性与有效性,使用Proteus软件对设计内容进行仿真验证,设计的煤矿井下安全监控分站具有瓦斯、温度等模拟量参数超标报警功能和电机开停、风门开闭等开关量指示功能;仿真结果表明:设计的煤矿井下安全监控分站具有一定的实际应用价值.  相似文献   

19.
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   

20.
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   

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