共查询到18条相似文献，搜索用时 156 毫秒
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本文通过对拉普拉斯算子和梯度极值微分算子两种边缘检测方法的比较，详细介绍了两种方法的原理，指出了拉普拉斯算子存在的问题，以及梯度极值微分算子在局部区域边界检测窗口内，直接提取边界象素，分割的边界为真实边界，边界连续性好。 相似文献
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经典的边缘提取是以原始的图像为基础,考察图像每个像素的每个邻域内灰度的变化,利用边缘邻近一阶或二阶方向导数变化规律用微分算子法检测边缘.Canny推导出最优边缘检测算子,边缘检测和定位优于其他算子. 相似文献
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在图像识别中,图像边缘分析有着十分重要的意义。人体边缘识别亦在图像边缘识别的工作中占着很大的比重。在OpenCV环境下,对人像图像中人体边缘的识别,使用合适的边缘检测算子能极大的提高识别的准确性和识别效率。主要介绍了三种应用于图像边缘分析的算子:canny算子,sabel算子和laplacian算子。 相似文献
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血吸虫病危害极大,及时发现血吸虫尾蚴在血吸虫病防治工作中具有非常重要的意义。本文从边缘检测技术出发,在介绍三种经典边缘检测算子(Roberts算子、Sobel算子、Prewitt算子)和Canny算子的基本原理基础上,利用四种算子对血吸虫尾蚴视频监控图像进行边缘检测处理。实验结果表明,相比其他三种算子,Canny算子能够较好地获取尾蚴的轮廓和纹理特征,有利于人们简单、迅速地识别血吸虫尾蚴。 相似文献
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图像处理中的边缘检测算法研究综述 总被引：3，自引：0，他引：3
边缘是图像最基本的特征,边缘检测在计算机视觉、图像分析等应用中起着重要的作用。该文就其几种经典的边缘检测算子和近年来出现的新的边缘检测方法进行了综述,分析了各种边缘检测算子的特点,提出了该领域所存在的问题与进一步所需做的工作。 相似文献
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《黑龙江科技信息》2015,(32)
图像边缘检测技术是处理数字图像的重要内容之一,它包含了目标物体显示在图像上的主要信息。边缘就是指一组相连的像素的集合,这些像素周围的灰度具有显著的变化的部分。边缘检测技术是从图像中提取感兴趣的对象的边缘信息(要去除不需要的信息),在图像的局部区域中针对像素点的一种运算,在图像的处理中有着重要的作用。因此边缘检测技术是分析图像和提取图像的主要内容的重要手段,在一些预处理的算法中有着重要的作用。在本文中首先分析了图像边缘检测技术的研究的意义和发展的现状,主要对边缘检测技术分析,主要是对边缘和梯度进行主要介绍,在接下来叙述各种经典的算子,比如Roberts算子,Sobel算子,Prewitt算子,Laplacian算子等,进一步了解这些算子的优缺点和适用性;在具体叙述传统的Canay边缘检测算法,并通过传统的Canay边缘检测算法进行不断改进,以更好的满足图像边缘的自动化检测以及检测的精确度等;最后总结图像边缘检测技术和未来的展望,随着科技的不断发展,图像边缘检测技术在生产和生活中起到的作用越来越重要。 相似文献
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为了有效地抑制噪声对图像的影响,能够清晰准确的对图像进行边缘提取,提出一种全方位、多尺度的数学形态学自适应边缘检测方法。该方法利用基本形态运算对噪声的抑制能力,并结合基本的形态检测算子,得到抗噪型的边缘检测算子。采用形态运算的加权组合构造出全方位、多尺度的数学形态学自适应边缘检测方法。实验表明,与经典的边缘检测算子相比,该方法运算简单,几何意义明确,而且在边缘检测的抗噪声等方面有着显著的优点。尤其是全方位、多尺度的形态学算子对于图像边缘的检测效果更好,它可以克服普通算子边缘不连续以及普通意义上的数学形态学上的对于噪声敏感等缺点。 相似文献
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对Robert边缘检测算子,Sobel边缘检测算子,Laplace边缘检测算子,Canny边缘检测算子这四种经典的边缘检测算子进行理论分析.然后在OpenCV应用平台下进行实验及结果分析.比较其各自的优缺点,从而选择效果最佳的边缘检测算子,应用在火灾检测系统的软件设计中. 相似文献
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利用小波分解后的平均与细节的特性,提出了一种新的图像融合方法。结合各种边缘检测算子和小波变换边缘检测方法,提出了一种新的边缘检测方法。 相似文献
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In this paper we study boundary value problems for anisotropic partial differential-operator equations with parameters. The principal part of the appropriate differential operators are not self-adjoint. Several conditions for the uniform separability in weighted Banach-valued Lp-spaces are given. Sharp estimates for the resolvent of the corresponding differential operator are obtained. In particular the positivity and R-positivity of these operators are established. As an application we study the separability of degenerate DOEs, maximal regularity for degenerate abstract parabolic problem with parameters, the uniform separability of finite and infinite systems for degenerate anisotropic partial differential equations with parameters. 相似文献
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This paper introduces a polynomial operator called the DT-polynomial as a novel approach to network flow problems. The class of networks dealt with is time-varying in the sense that the capacity, cost, and travel-time of each edge may vary in discrete time. The Dt-polynomial is a polynomial in two operators, D (delay) and T (time), which is used for describing the time-varying transmission characteristics. The paper starts with the mathematics involving the DT-polynomials. A new shortest arrival route algorithm is presented, and its computational complexity is found to be favorable in comparison with others such as Dijkstra's method and the potential method derived from Ford-Fulkerson's technique. Furthermore, a dynamic flow problem is formulated and analyzed in terms of DT-polynomials, and a latest-departure earliest-arrival schedule is given. Finally, a modified DT-polynomial is applied to digital filter networks. 相似文献
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本文全面分析了Pal.King模糊边缘检测算法存在的缺陷,提出了一种新的改进型Pal.King模糊边缘检测算法,并将其应用到AVI视频边缘检测。该算法针对Pal.King算法中对隶属度阈值的设置存在的不足,通过重新定义模糊隶属度函数,反复实验,确定了各参数的最佳值。仿真结果比较显示,改进后的算子复杂度得到降低,效率得以显著提高,边缘检测效果更佳。 相似文献
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With the development of information technology and economic growth, the Internet of Things (IoT) industry has also entered the fast lane of development. The IoT industry system has also gradually improved, forming a complete industrial foundation, including chips, electronic components, equipment, software, integrated systems, IoT services, and telecom operators. In the event of selective forwarding attacks, virus damage, malicious virus intrusion, etc., the losses caused by such security problems are more serious than those of traditional networks, which are not only network information materials, but also physical objects. The limitations of sensor node resources in the Internet of Things, the complexity of networking, and the open wireless broadcast communication characteristics make it vulnerable to attacks. Intrusion Detection System (IDS) helps identify anomalies in the network and takes the necessary countermeasures to ensure the safe and reliable operation of IoT applications. This paper proposes an IoT feature extraction and intrusion detection algorithm for intelligent city based on deep migration learning model, which combines deep learning model with intrusion detection technology. According to the existing literature and algorithms, this paper introduces the modeling scheme of migration learning model and data feature extraction. In the experimental part, KDD CUP 99 was selected as the experimental data set, and 10% of the data was used as training data. At the same time, the proposed algorithm is compared with the existing algorithms. The experimental results show that the proposed algorithm has shorter detection time and higher detection efficiency. 相似文献
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This paper studies the consensus problem of multi-agent systems by event- and self-triggered control. An event-triggered algorithm with periodic event detection and relative state measurements is designed to determine all event times. Furthermore, a self-triggered control algorithm with periodic event detection and quantization is proposed to further reduce resource consumption. In the proposed control strategies, only relative state information, or called edge information, is utilized by controllers, and all edge state information incident to each agent is processed together. The results are illustrated by two numerical experiments. 相似文献