共查询到20条相似文献，搜索用时 296 毫秒
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目前图像模板匹配算法一般都有计算量非常大的缺点,在实际运用中存在一定问题,根据这一问题提出了将演化算法应用到图像模板相关匹配中。模板匹配实际是寻找最优解的问题,将模板和子图像的互相关函数作为目标函数,基于演化的郭涛算法实现了模板匹配的最优解。最后根据实验说明了该算法较传统的遍历式模板匹配算法具有计算量大大减少的优越性。 相似文献
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在电视广告监播系统中,要采用图像模式识别的办法对电视广告进行监播。在进行模式识别之前,有必要选取一种适应性强,并且高度自动化的二值化方法对电视广告图像进行预处理。针对电视广告监播系统的特点,对模糊C均值聚类算法进行了研究并将其应用于图像二值化,实现了系统所需要的自动二值化。在该系统的图像识别模块中,待检测的对象具有确定性,因此可以采用预先存储的样本,用模板匹配法进行识别,针对其数据量极大的特点,因此采用由模板匹配改进的序贯相似性算法,该算法能显著地减少计算量。 相似文献
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在电视广告监播系统中，要采用图像模式识别的办法对电视广告进行监播。在进行模式识别之前，有必要选取一种适应性强，并且高度自动化的二值化方法对电视广告图像进行预处理。针对电视广告监播系统的特点，对模糊C均值聚类算法进行了研究并将其应用于图像二值化，妻现了系统所需要的自动二值化。在该系统的图像识别模块中，待检测的对象具有确定性，因此可以采用预先存储的样本，用模板匹配法进行识别，制对其数据量极大的特点，因此采用由模板匹配改进的序贯相似性算法，该算法能显著地减少计算量。 相似文献
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卡尔曼滤波是建立在状态空间表达式基础上的最优递推滤波算法，是许多现代多传感器数据融合的算法基础，但是，卡尔曼滤波要求系统的状态方程和观测方程都是线性的，然而许多工程系统往往不能用简单的线性系统来描绘，由此引入多分辨率的思想，对卡尔曼滤波进行改进，含义是指系统的状态有动态微分方程约束，不断获得系统得观测，并实时地给出系统状态的估计，多分辨率是指可以在不同的分辨率上获取系统不同精度的量测,并给出其可测性分析。 相似文献
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针对复杂交通场景中运动车辆检测方法存在的局限性,本文提出了一种基于中值模型和自适应阈值的运动检测算法。利用自适应阈值对差分图像的三个颜色通道进行二值化处理,实现了运动目标的精确检测,采用中值更新策略实现背景图像的实时更新。实验结果表明,算法可以从复杂交通场景图像序列中有效地检测出运动目标,且算法计算量小,具有良好的鲁棒性与实时性。 相似文献
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针对无人机采集图像时因为采集条件的影响,图像拼接延时较大的缺陷,提出图像匹配的快速方法,在匹配过程中引入POS观测值减少搜索时间,采用平均金字塔生成金字塔图像,特征点的匹配开始于分辨率最低的图像层,将上一层的图像匹配结果做为次层匹配的粗集.在初始的图像中得到匹配点后,基于RANSAC算法估计出变换矩阵的稳健值H;最后采用LM非线性优化算法进行优化;概述并研究图像融合的方法,实现快速拼接.实验表明,这种方法大幅提高拼接时间,提高了效率. 相似文献
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电力系统状态估计是建立电网运行状态数据实时数据库的必然选择。可观测性分析作为电力系统状态估计的第一步,直接决定了状态估计能否正常进行。本文基于深度优先算法对电力系统可观测性加以分析,并以IEEE-30系统为例验证了该方法的有效性。 相似文献
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本文研究一种改进的近邻搜索算法的图像匹配技术。本文采用基于特征的图像匹配方法,利用SIFT算法提取特征点。在特征点匹配的过程中,为提高搜索样本特征点的最近邻和次近邻特征点的速度,本文采用一种基于二叉检索树算法改进的近邻搜索算法,该算法用最近邻与次近邻比值来进行特征点的匹配。用MATLAB语言实现该算法并运用到图像特征匹配中,实验证明优于原算法并具有较高实时性。 相似文献
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提出了一种基于光场渲染的动态3D目标重构的方法.目前基于图像建模的方法对于复杂场景难以建模,而基于图像渲染的方法因数据量大不利于动态场景的实时渲染.因此采用了模型和图像相结合的方法,从多视点视频图像中重建动态3D模型,采用光场映射算法对重建的3D模型进行光场采样,然后对样本分解压缩.实验结果表明,在保证真实感的同时,减少了数据量,并可实现动态3D目标的重构. 相似文献
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XMage is introduced in this paper as a method for partial similarity searching in image databases. Region-based image retrieval is a method of retrieving partially similar images. It has been proposed as a way to accurately process queries in an image database. In region-based image retrieval, region matching is indispensable for computing the partial similarity between two images because the query processing is based upon regions instead of the entire image. A naive method of region matching is a sequential comparison between regions, which causes severe overhead and deteriorates the performance of query processing. In this paper, a new image contents representation, called Condensed eXtended Histogram (CXHistogram), is presented in conjunction with a well-defined distance function CXSim() on the CX-Histogram. The CXSim() is a new image-to-image similarity measure to compute the partial similarity between two images. It achieves the effect of comparing regions of two images by simply comparing the two images. The CXSim() reduces query space by pruning irrelevant images, and it is used as a filtering function before sequential scanning. Extensive experiments were performed on real image data to evaluate XMage. It provides a significant pruning of irrelevant images with no false dismissals. As a consequence, it achieves up to 5.9-fold speed-up in search over the R*-tree search followed by sequential scanning. 相似文献
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善治视野下的协同治理研究 总被引：2，自引：0，他引：2
善治的本质特征在于,它是政府与公民对公共生活的合作管理,是使公共利益最大化的社会管理过程。善治视野下,协同治理正是通过主体间资源和要素的良好匹配,达到政治国家与公民社会合作关系的最佳状态,是实现从治理到善治的途径。通过分析并重新厘清协同治理概念,指出协同治理的内涵为主体间合作的匹配性、一致性、动态性、有序性和有效性,同时,探析协同治理的观念指导、方法论及技术手段等理论价值。 相似文献
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提出了一种人脸关键点检测方法,该方法用了少量的正面图像,不用归一化人脸图像,而传统的人脸关键点检测方法需要对图像进行严格预处理。随机森林是一种分类器融合算法,可以很好地解决多类分类问题,虽然LBP特征简单,但其可以包含大量的纹理信息。利用改进的LBP特征与随机森林相结合,构成一种对人脸关键点检测的方法。通过高斯平滑图像的LBP特征的提取,对每个点生成特征,计算出有用的特征作为正例,并且与反例集合变为训练集。通过随机森林分类器进行分类,误差率较低,仅在10％左右。 相似文献
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Quantitative feedback theory (QFT) is a powerful design technique for robust feedback control systems with plant uncertainties. In applying QFT to design robust feedback control systems, the generation of plant templates is an essential step. For a system with affinely dependent parameters and the parameter domain is a box, it is well known that the boundary of a plant template is included in the image of the set of edges of the parameter domain box. One can obtain the plant template from the image of the set of edges. However, this approach to the generation of the plant template leads to heavy computational burden since it wastes much computational effort computing the images of points on edges which lie in the interior of the plant template. In this paper, an efficient algorithm is proposed to identify, from an edge of the parameter domain box, the set of parameter points whose image lies in the interior of the plant template. The computational burden for generating the plant template thus can be obviously reduced by eliminating the identified sets of parameter points in the plant template generation procedure. Numerical examples are included to illustrate the efficiency of the algorithm. 相似文献
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本文描述了一种以TMS320C6202数字信号处理器为核心的高速图像处理板和图像实时采集卡及摄像头构成的实时运动跟踪系统。提出了一种快速图像匹配的相关跟踪算法,给出了在复杂背景下跟踪飞机的实验结果。实验证明该系统性能可靠,跟踪效果较好,并有较高的实时性。 相似文献
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Liang Jia Junguo Zhang Shuyue Chen Zhenjie Hou 《Journal of The Franklin Institute》2018,355(15):7764-7798
Automated fabric inspection is a challenging task due to the unpredictable visual forms of the fabric defects and their scarcity compared with the tremendous amount of defect-free fabric products. This paper proposes a novel method based on lattice segmentation and lattice templates which automatically identifies the defects of fabric images. With the proposed method, a fabric image is segmented to lattices by inferring the placement rule of the texture primitives categorized to distinct texture classes. Each texture class is modeled by multiple templates inferred from the defect-free samples based on some metrics determined a priori according to their inspection efficiencies. For a lattice segmented from a given image, the most similar template is identified through a template matching process which compensates the local deformations around the lattice, and the distances between the lattice and the identified template are estimated based on the selected metrics. The lattices of distances exceeding the learnt distance range are identified as defective. The performance of the proposed method is evaluated based on two databases respectively providing pixel-level and image-level evaluations. For both databases, the receiver operating characteristic curves are plotted and the average areas under curves are 0.86 and 0.95, respectively, for pixel-level and image-level databases. The proposed method is further tested on the blurred and noisy version of images from pixel-level database and the resulting area is 0.81 on average. The proposed method outperforms the state-of-the-art methods by comparing corresponding areas. 相似文献