共查询到20条相似文献，搜索用时 15 毫秒
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图像边缘检测一直是图像处理领域研究的重点问题。边缘是图像最基本的特征,本文采用了模糊K-均值聚类算法对图像进行边缘检测。该方法针对不同的图像找到相对比较有效的边缘检测算法,进而大幅度地减少了数据量,保留了图像重要的结构属性。通过mat lab实验,证明了该方法可以有效提取图像的边缘信息。 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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Mallat和小波算法在车牌定位系统中的研究 总被引：1，自引：0，他引：1
为了解决含噪车牌图像的定位问题,文章对小波分析在图像的降噪和边缘检测的原理及算法方面进行了深入的研究,在此基础上提出了一种基于Mallat和小波分析的边缘检测和图像分割方法。根据该方法,开发了基于VC＋＋6.0的定位系统,实验结果表明,定位效果好,分割精度高,可以达到98.5%的准确率。 相似文献
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通过对灰度图像的边缘检测的研究,构造了一种新的基于色度差的边缘检测算法,并充分利用彩色图像的颜色信息,将此算法从灰度图像转化到RGB的颜色空间中。这种新方法旨在区别于传统意义上对图像的边缘检测要求的精准性,而把提取出彩色图像中直观形象的轮廓信息作为研究目的。实验仿真表明,该算法提取出的边缘能够较好地反映目标图像中具有代表性的信息。 相似文献
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《Information processing & management》2022,59(6):103101
On-shelf book segmentation and recognition are crucial steps in library inventory management and daily operation. In this paper, a detailed investigation of related work is conducted. RFID and barcode-based solutions suffer from expensive hardware facilities and long-term maintenance. Digital Image processing and OCR techniques are flawed due to a lack of accuracy and robustness. On this basis, we propose a visual and non-character system utilizing deep learning methods to accomplish on-shelf book segmentation and recognition tasks. Firstly, book spine masks are extracted from the image of on-shelf books by instance segmentation model, followed by affine transformation to rectangle images. Secondly, a spine feature encoder is trained to learn the deep visual features of spine images. Finally, the book inventory search space is constructed and the similarity metric between spine visual representations is calculated to recognize the target book identity. To train the models we collect high-resolution datasets of 10k-level and develop a data annotation software accordingly. For validation, we design simulated scenarios of recognizing 3.6k IDs from 5.6k book spines and achieve a best top1 accuracy of 99.18% and top5 accuracy of 99.91%. Furthermore, we develop a prototype of a mobile library management robot with embedded edge intelligence. It can automatically perform on-shelf book image capturing, spine segmentation and recognition, and target book grasping workflow. 相似文献
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在分析基于图像处理的人数统计方法基础上,提出基于图像边缘检测的人数统计新方法。分别采集室内彩色背景图像和目标图像,分别计算灰度图像的边缘检测结果,求出二者的差值图像后,连接边缘、填充为连通区域,计算目标图像中的人数。实验证明：该方法能满足室内人数比较多的人数统计要求,具有速度快和准确率较高的优点。 相似文献
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基于ARM7与FPGA架构的面阵CCD图像采集系统的设计 总被引：1，自引：0，他引：1
针对用于铁路、公路等行业移动检测的面阵CCD图像采集系统对于小型化与低功耗的需求,设计了一种基于ARM7与FPGA架构的面阵CCD图像采集系统。本文介绍了系统设计的基本原理,并着重阐述了图像A/D转换单元、图像缓冲单元、图像处理单元等系统主要组成部分的软、硬件设计。本系统利用FPGA控制视频信号的采集、ARM7微控制器作为图像处理单元,并利用μC/OS-II实时操作系统对多任务进行管理,系统扩展灵活,满足小型化与低功耗的要求。 相似文献
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《Journal of The Franklin Institute》2022,359(13):6939-6957
In this paper, a self-triggered model predictive control (MPC) strategy is developed for discrete-time semi-Markov jump linear systems to achieve a desired finite-time performance. To obtain the multi-step predictive states when system mode jumping is subject to the semi-Markov chain, the concept of multi-step semi-Markov kernel is addressed. Meanwhile, a self-triggered scheme is formulated to predict sampling instants automatically and to reduce the computational burden of the on-line solving of MPC. Furthermore, the co-design of the self-triggered scheme and the MPC approach is adjusted to design the control input when keeping the state trajectories within a pre-specified bound over a given time interval. Finally, a numerical example and a population ecological system are introduced to evaluate the effectiveness of the proposed control. 相似文献
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马赛克是多年来困扰广电工作者的问题,目前我国大多数无线覆盖台站仍沿用人工监看的方法来监测电视视频的马赛克现象,这一做法显然已不能满足愈来愈高的安全播出要求。文章提出一种基于MATLAB的视频马赛克检测算法,在对视频图像进行canny边缘检测的基础上,通过模板匹配来实现马赛克检测,仿真实验的结果验证了本算法的有效性和实时性。 相似文献
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眼睛定位是很多人脸检测算法的关键步骤,是近二十年来图像处理、模式识别和计算机视觉领域中极富挑战性的研究课题之一。眼睛定位常用的精确检测方法主要有：霍夫变换法、变形模板法、边缘特征分析法和对称变换法等。文中采用一种基于积分投影的方法进行眼睛位置的有效快速定位,并分别利用水平和垂直灰度积分投影曲线结合人脸的结构特征找到眼睛的位置坐标,实现了准确的眼睛定位。 相似文献
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图像处理就是利用计算机及其有关技术,对图像进行运算和处理,可以使图像更清晰,从图像中提取某些特定的信息,从而达到某种特定目的,随着计算机技术的发展,图像识别技术获得了越来越广泛的应用。文章采用灰度化、消噪等方法对图像进行预处理,采用边缘提取、形态学处理、字符定位等方法实现图像字符特征提取,通过Matlab软件编写字符识别程序,实现图像字符识别。研究结果表明,采用图像处理可有效实现对图像字符的识别。 相似文献
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研究文本定位与特征提取问题。针对传统的Canny算子图像检测算法的不足,提出了一种改进的Canny算子图像信息特征提取算法。研究方法是:首先对彩色图像进行高斯金字塔分解,然后用Canny算子检测彩色图像,提取边缘图像,再经过通二值化,去噪方差投影定位文本区域。实验结果表明,本文提出的方法有效、实用。 相似文献
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《Information processing & management》2022,59(5):103031
Online recommender systems have been shown to be vulnerable to group shilling attacks in which attackers of a shilling group collaboratively inject fake profiles with the aim of increasing or decreasing the frequency that particular items are recommended. Existing detection methods mainly use the frequent itemset (dense subgraph) mining or clustering method to generate candidate groups and then utilize the hand-crafted features to identify shilling groups. However, such two-stage detection methods have two limitations. On the one hand, due to the sensitivity of support threshold or clustering parameters setting, it is difficult to guarantee the quality of candidate groups generated. On the other hand, they all rely on manual feature engineering to extract detection features, which is costly and time-consuming. To address these two limitations, we present a shilling group detection method based on graph convolutional network. First, we model the given dataset as a graph by treating users as nodes and co-rating relations between users as edges. By assigning edge weights and filtering normal user relations, we obtain the suspicious user relation graph. Second, we use principal component analysis to refine the rating features of users and obtain the user feature matrix. Third, we design a three-layer graph convolutional network model with a neighbor filtering mechanism and perform user classification by combining both structure and rating features of users. Finally, we detect shilling groups through identifying target items rated by the attackers according to the user classification results. Extensive experiments show that the classification accuracy and detection performance (F1-measure) of the proposed method can reach 98.92% and 99.92% on the Netflix dataset and 93.18% and 92.41% on the Amazon dataset. 相似文献
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本文首先简述了丝绸之路及河南段洛阳旅游区申请世界文化遗产的概况,在此基础上对洛阳进行了形象营销研究:首先简述了旅游营销的基本理论;然后通过对申遗景点、地方性、旅游者感知、市场竞争替代和已有形象定位的分析确定了河南段洛阳旅游区形象总体定位;基于形象定位就宣传口号、人—地感知形象、人—人感知形象进行了系统设计;最后提出了旅游形象的推广策略. 相似文献