基于改进的Sobel算子边缘检测算法

为了解决传统的Sobel算子算法存在的斜向方向不敏感问题,提出了一种改进的Sobel算法。该算法在Sobel 算子基础上,增加了45°和135°2个方向模板,并且以斜向边缘为主重新分配了算子模板的权重。算法先将图像转换为灰度图像,然后用改进的Sobel算子得到梯度图像,再采用局部梯度阈值对梯度图像进行细化处理,最后结合斜向边缘方向域值进行二值化,得到边缘图像。仿真实验表明,与传统Sobel算法相比,该算法提高了检测精度,使得边缘细节更丰富、更连续。     

基于改进的Sobel算子边缘检测算法

为了解决传统的Sobel算子算法存在的斜向方向不敏感问题,提出了一种改进的Sobel算法。该算法在Sobel算子的基础上,增加了45°和135° 2个方向模板,并且以斜向边缘为主重新分配了算子模板的权重。算法先将图像转换为灰度图像,然后用改进的Sobel算子得到梯度图像,再采用局部梯度阈值对梯度图像进行细化处理,最后结合斜向边缘方向域值进行二值化,得到边缘图像。仿真实验表明,与传统Sobel算法相比,该算法提高了检测精度,使得边缘细节更丰富、更连续。     

基于改进Sobel算子的螺纹边缘检测

针对工业精密测量中螺纹边缘检测的问题,主要研究了基于Sobel算子的螺纹边缘的检测方法.结合螺纹模型的特点,在对图像进行灰度化和去噪等预处理的基础上,增加六个方向模板对Sobel算子进行改进.实验证明该方法有效解决了Sobel算子边缘检测时边缘过粗的问题,得到的边缘较细,定位精确,有利于提高测量精度.     

基于改进Sobel算子的边缘检测系统的设计与实现

边缘检测是图像处理及计算机视觉中的基本问题之一,而Sobel算子对于边缘检测来说,则是最重要的算子之一.针对传统Sobel算子的局限性以及PC端串行化处理图像的效率较低的问题,提出了一种改进的方法,首先将传统Sobel算子的模板方向由2个变为8个,充分利用图像中的像素点的方向信息,然后根据现场可编程门阵列(Field ...     

基于C#的模板算子法数字图像边缘检测技术分析与实现

边缘检测是图像处理中的重要内容,边缘是图像中灰度值不连续或突变的结果。边缘检测的方法有很多,本文仅就典型的模板算子法进行分析并对原Sobel算子、Prewitc算子边缘检测方向模板进行扩展,然后用C≠编程语言实现这些算法。     

梳理齿片最优Sobel算子边缘检测算法研究

精梳机锯齿整体锡林所用梳理齿片的质量会直接影响精梳机的梳理效果。针对经典Sobel边缘检测算子存在图像边缘定位精度低和对噪声敏感等缺点,提出了一种最优Sobel算子边缘检测算法用于梳理齿片图像边缘检测。该算法在经典Sobel算子2个方向成像模板基础上增加6个方向成像模板以提高定位精度,同时通过最优阈值的选取使图像具有良好的抗噪性能。实验结果表明,该算法对梳理齿片图像边缘提取具有很好的检测精度,且抗噪能力和准确性都具有可行性和实用价值。     

基于数学形态学细化算法的图像边缘细化

为了解决Sobel算子在阈值选择不当的情况下易造成图像边缘丢失或产生伪边缘的问题,通过最大类间方差的方式选出合适的阈值;同时利用数学形态学细化算法对该边缘图像进行细化处理。实验结果显示,该方法在保持原有边缘图像特征信息的前提下,比传统Sobel算子得到了更好的结果。     

基于Sobel算子的图像边缘检测实验分析

本文首先介绍了数字图像处理传统边缘检测算子,然后详细描述了其中具有代表性的Sobel边缘检测算法的原理,并从模板遵循的原则和数学原理两个方面分析了Sobel算子的模板权值取定。实验结果表明,Sobel算子模板的关键权值取2时,边缘较细,定位精确,提高了边缘检测精度。     

结合Canny算子的图像二值化方法

用Robert、Sobel、Prewitt、Laplacian、LoG和Canny算子,对图像进行了边缘检测实验,分析了边缘检测的结果,得出Canny边缘检测算子,是图像边缘检测的一种十分有效的方法。然后,根据图像的Canny算子边缘信息,将最佳全局阈值法与局部阈值自适应法在边缘信息的基础上融合起来,对图像进行了二值化处理。实验表明此算法在二值化图像时,能很好的保留图像的边缘信息。     

基于分数阶微分和Sobel算子的边缘检测新模型

现有的边缘检测算法对噪声敏感,检测到的图像边缘效果不够理想,得到的图像边缘有可能模糊不清。为了克服这些不足,以分数阶微分理论为基础,结合Sobel算子边缘检测方法,提出了一种基于分数阶微分和Sobel算子的边缘检测新模型。理论研究和实验结果表明,与现有方法相比较,该模型不仅能较好地提取图像边缘特征,而且对噪声具有一定的抑制作用;特别地,对于纹理细节较丰富的图像而言,该模型能够检测出更多的纹理细节信息,优于常用的整数阶微分方法,是一种有效的边缘检测方法。     

Assessing Ideational and Evaluative Skills and Creative Styles and Attitudes

This article describes the rationale for the multiphase creative problem solving process, and reports the findings from an empirical investigation conducted to facilitate the problem solving of managers. The ideational skills of the managers were assessed before and after training in a complete process of creative problem solving, along with their ideational attitudes, creative problem solving style (i.e., generator, conceptualizer, optimizer, or implementor), and evaluative skill (i.e., ability to recognize original ideas). The most important findings indicated that the training had a significant impact on the evaluative accuracy of the managers. They were significantly more accurate in their judgments about original ideas after training, both in their identification of original ideas and their recognition of unoriginal ideas. After training, the managers also gave more solutions and more original solutions to problems. Finally, several variables (e.g., the “preference for active divergence” attitude, and the conceptualizer process style) seemed to moderate the impact of training. Training was therefore effective, with specific effects that can be predicted from pre-training individual differences in attitudes and process style.     

高等院校行政分析与决策系统的设计与实现

为提高高等院校的管理水平和决策水平,充分利用校园网资 源,开发了高等院校行政财政分析与决策系统。解决了诸如数据的动态查询、自动生成报表 、网络环境下数据共享等技术问题,具有网上数据共享、图形界面友好和安全的保密措施等 特点。     

Semantics and verification of monitors and systems of monitors and processes

In this paper we present a sound and complete semantics for the monitor concept of C.A.R. Hoare. First a method for specification of monitors, introduced by O.-J. Dahl, is reviewed. This method is based on the relation between the historic sequence of monitor procedure calls and the historic sequence of monitor procedure exits. Based on such specifications and our new monitor semantics we present a method by which it is possible to prove that a concrete monitor is an implementation of an abstract one. In the last part of the paper an axiomatic semantics for systems of concurrent processes and monitors is introduced. The method supports verification by separation of concerns: Properties of the communication to and from each process are proven in isolation by a usual Hoare style axiomatic semantics, while abstract monitors are also specified in isolation by the method reviewed in the first part of the paper. These properties of the components of the system are then used in a new proof rule to conclude properties of the complete system. Stein Gjessing received a Ph.D. (actually a Dr. philos.) from the University of Oslo (Norway) in 1985. Presently he is an Associate Professor at the Institute of informatics, University of Oslo, Norway. Dr. Gjessings research interests are in the area of concurrent and distributed programming, operating systems, formal specification and verification and programming languages.     

Stochastic balancing and approximation-stability and minimality

A new method of stochastic model reduction has recently been introduced by Desai et al. [1], [2]. The stability of the reduced order model has not previously, been considered. In this paper, we show that the stability of the reduced order model follows directly from the results of Pernebo and Silverman [3]. It is also shown that the reduced order model is minimal, in the controllability/observability sense. The relevance of this notion of minimality to stochastic minimality is made clear.     

Integrating and automating analysis and optimization

The development of an interface coupling program on personal computers for an analysis software system such as ANSYS, SAP, etc. and an optimization software system, MOST, is presented. By controlling and directing the communications the interface coupler integrates the two programs while retaining their versatility and interactive features. The integrated system is used to solve a numerical example of active noise control for a three-dimensional enclosure, in which an energy density level of control points is minimized by adding the sound source to cancel the unwanted noise. The interface coupling program automates with relatively low cost the iterative process for designing an engineering system, remaining flexible in acoustical modelling and efficient in equation solving. Also, the coupling interface is developed in a general-purpose way so that it can be expanded easily to integrate more analysis software packages of different kinds.