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2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)最新文献

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Current Status and Development Trend of Crowd Counting 人群统计的现状与发展趋势
Jiaming Niu, Yu Yang, Tong Yue
As a challenging task, crowd counting has attracted the attention of researchers due to its wide application in the fields of smart video surveillance, smart city construction, and public safety. But at the same time, the impact of many factors, including occlusion, scale changes, and perspective distortion, on task accuracy is still a problem that needs to be solved urgently. On the basis of combing and summarizing the relevant literature, the mainstream population counting methods are reviewed to lay the foundation for more in-depth research in the future. Firstly, it analyzes the research background, current situation and development trend of crowd counting method as a whole. Secondly, the traditional counting method is summarized with the three angles of detection, regression and density estimation as the starting point. Then, it focuses on the crowd counting method based on CNN. Once again, a brief introduction to commonly used counting data sets is given, and Ground Truth generation methods and mainstream evaluation indicators are explained. Finally, based on a series of analyses, the main characteristics and development prospects of population counting are summarized.
人群统计作为一项具有挑战性的任务,在智能视频监控、智慧城市建设、公共安全等领域有着广泛的应用,引起了研究者的关注。但与此同时,遮挡、尺度变化、视角失真等诸多因素对任务精度的影响仍然是一个亟待解决的问题。在梳理和总结相关文献的基础上,对主流人口统计方法进行综述,为今后更深入的研究奠定基础。首先,从整体上分析了人群计数方法的研究背景、现状和发展趋势。其次,以检测、回归和密度估计三个角度为出发点,总结了传统的计数方法。然后重点介绍了基于CNN的人群计数方法。再次简要介绍了常用的计数数据集,并解释了地面真值生成方法和主流评价指标。最后,在一系列分析的基础上,总结了人口统计的主要特点和发展前景。
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引用次数: 0
Verification Code Recognition Based on Convolutional Neural Network 基于卷积神经网络的验证码识别
Q. Tian, Qishun Song, Hongbo Wang, Zhihong Hu, Siyu Zhu
Verification code recognition system based on convolutional neural network. In order to strengthen the network security defense work, this paper proposes a novel verification code recognition system based on convolutional neural network. The system combines Internet technology and big data technology, combined with advanced captcha technology, can prevent hackers from brute force cracking behavior to a certain extent. In addition, the system combines convolutional neural network, which makes the verification code combine numbers and letters, which improves the complexity of the verification code and the security of the user account. Based on this, the system uses threshold segmentation method and projection positioning method to construct an 8-layer convolutional neural network model, which enhances the security of the verification code input link. The research results show that the system can enhance the complexity of captcha, improve the recognition rate of captcha, and improve the security of user accounting.
基于卷积神经网络的验证码识别系统。为了加强网络安全防御工作,本文提出了一种基于卷积神经网络的验证码识别系统。该系统结合了互联网技术和大数据技术,结合先进的验证码技术,可以在一定程度上防止黑客的暴力破解行为。此外,系统结合卷积神经网络,使验证码由数字和字母组合而成,提高了验证码的复杂度和用户账号的安全性。在此基础上,系统采用阈值分割法和投影定位法构建了8层卷积神经网络模型,增强了验证码输入环节的安全性。研究结果表明,该系统可以增强验证码的复杂度,提高验证码的识别率,提高用户计费的安全性。
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引用次数: 1
Action recognition based on R2.5D-GRU networks 基于R2.5D-GRU网络的动作识别
Xiaolin Ma, Yuying Xiao
The field of body action recognition is a research hotspot in computer vision. Due to the complex calculation process of traditional recognition algorithms and the limitations of the data set to be processed, action recognition algorithms based on deep learning have gradually attracted attention. Various network frameworks have been proposed, which greatly improved the recognition Accuracy. In view of some problems in the action recognition algorithm of deep learning at this stage, this paper proposes a new R2.5D-GRU network. First, the 3D convolution is decomposed into a two-dimensional spatial convolution and a one-dimensional time convolution, and the low-level spatio-temporal features are extracted, and the high-level temporal features are extracted using GRU for temporal modeling. Experimental results show that the algorithm proposed in this paper performs better than some existing mainstream algorithms in the UCF101 data set.
人体动作识别是计算机视觉领域的一个研究热点。由于传统识别算法计算过程复杂以及处理数据集的局限性,基于深度学习的动作识别算法逐渐受到关注。提出了多种网络框架,大大提高了识别精度。针对现阶段深度学习动作识别算法中存在的一些问题,本文提出了一种新的R2.5D-GRU网络。首先,将三维卷积分解为二维空间卷积和一维时间卷积,提取低层时空特征,并利用GRU提取高层时间特征进行时间建模;实验结果表明,本文提出的算法在UCF101数据集上的性能优于现有的主流算法。
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引用次数: 0
AMO-Net: abdominal multi-organ segmentation in MRI with a extend Unet AMO-Net:腹部多器官分割的MRI扩展Unet
Chao Jia, Jianjing Wei
Abdominal organ-related diseases have become one of the main diseases that affect people’s healthy life. MRI is a clinical diagnosis method for abdominal-related diseases. Through MRI, doctors can have a more intuitive observation of the tissue lesions in the human abdomen to make more detailed observations. Accurate diagnosis, therefore, accurate image segmentation of MRI images has very important clinical value. Traditional segmentation methods are relatively inefficient for organ segmentation with large abdominal deformation, small volume and blurry tissue edges. In this paper, we propose a AMO-Net to overcome these limitations. First, we extend the single encoder-decoder architecture to 2 layers to learn richer feature representations. Second, the feature pyramid structure is introduced into the proposed network, which can effectively handle multi-scale changes, is friendly to small target object recognition, and can be associated with remote feature information. Finally, a module called Hierarchical-Split Block is introduced to improve CNN performance. We evaluate our model on the CHAOS challenge dataset, and the final experiment proves that our model achieves better segmentation performance compared with other state-of-the-art segmentation networks.
腹部脏器相关疾病已成为影响人们健康生活的主要疾病之一。MRI是腹部相关疾病的临床诊断方法。通过MRI,医生可以更直观地观察到人体腹部的组织病变,进行更详细的观察。因此,准确诊断、准确分割MRI图像具有非常重要的临床价值。对于腹部变形大、体积小、组织边缘模糊的器官分割,传统的分割方法效率较低。在本文中,我们提出了一个AMO-Net来克服这些限制。首先,我们将单编码器-解码器架构扩展到2层,以学习更丰富的特征表示。其次,在网络中引入特征金字塔结构,有效处理多尺度变化,有利于小目标物体识别,并能与远程特征信息相关联;最后,引入了分层块模块来提高CNN的性能。我们在CHAOS挑战数据集上评估了我们的模型,最后的实验证明,与其他最先进的分割网络相比,我们的模型具有更好的分割性能。
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引用次数: 3
Research on correction and recognition of QR code on cylinder 圆柱上QR码的校正与识别研究
Jing Jin, Keyi Wang, Wei Wang
In the actual application, the QR code was affected by the collection conditions, environment and surface of substrate, which would cause a series of defects such as noise pollution, local highlight and geometric distortion. These defects would lead to the reduction of recognition rate. The research of preprocessing, area detection, extraction and correction processing for these defects was based on the principle of image processing. Methods were proposed to optimize the QR code and improve the recognition rate. According to the basic principles of digital image processing, the processing technology of QR code was analyzed. The algorithm of threshold segmentation, the molecular block Otsu method was used to deal with the uneven illumination. Based on the special structural features of the position detection pattern, the QR code was detected and extracted from the image. The method of anti-perspective transformation was used to correct the QR code with geometric distortion. The QR code printed on the surface was fitted to surface area, and the corrected graphic was obtained. Then grayscale was interpolated into the corresponding coordinates to get the corrected QR code. The jagged and virtual dots in the image were eliminated by the morphological close operation. The results showed that the Otsu method that combined with the principle of threshold segmentation was applied to process the QR code with uneven lighting and low brightness.
在实际应用中,QR码受采集条件、环境、基材表面等因素的影响,会产生噪声污染、局部高光、几何畸变等一系列缺陷。这些缺陷会导致识别率的降低。基于图像处理的原理,对这些缺陷进行预处理、区域检测、提取和校正处理。提出了优化QR码,提高识别率的方法。根据数字图像处理的基本原理,分析了二维码的处理技术。采用阈值分割算法——分子块Otsu法来处理光照不均匀问题。基于位置检测模式的特殊结构特征,检测并提取图像中的QR码。采用反透视变换的方法对具有几何畸变的二维码进行校正。将打印在表面的二维码拟合到表面区域,得到校正后的图形。然后将灰度插值到相应的坐标中,得到校正后的二维码。通过形态学闭合运算消除了图像中的锯齿点和虚点。结果表明,结合阈值分割原理的Otsu方法可用于处理光照不均匀、亮度低的二维码。
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引用次数: 2
Design of Hybrid Learning Mode in Higher Vocational Colleges Based on Cloud Platform 基于云平台的高职混合学习模式设计
Shuai Zhang, Jinlong Wang, Decai Wang
The rapid development of information technology and its in-depth application in various industries have brought about tremendous changes in people's life and learning methods. Students often arrange time before class to log in to the cloud class platform, and participate in discussions and interactions through learning micro-class videos, animations, courseware, documents, websites and other teaching resources provided by teachers to complete the learning tasks required by the learning task list. This study uses the social statistics software package SPSS22.0 to analyze the questionnaire. The validity analysis uses the principal component analysis method and the maximum variation method orthogonal rotation for confirmatory factor analysis, and forced extraction of four factors. Data shows that 53.1% of learners believe that online learning based on cloud platforms can improved learning Efficiency. The hybrid learning model based on the cloud platform can solve the time wasting problem in traditional classrooms and meet the needs of students' autonomous learning.
信息技术的飞速发展及其在各行各业的深入应用,给人们的生活和学习方式带来了巨大的变化。学生经常在课前安排时间登录云课堂平台,通过学习教师提供的微课视频、动画、课件、文档、网站等教学资源,参与讨论和互动,完成学习任务列表要求的学习任务。本研究使用社会统计软件包SPSS22.0对问卷进行分析。效度分析采用主成分分析法和最大变异法正交旋转法进行验证性因子分析,并强制提取4个因子。数据显示,53.1%的学习者认为基于云平台的在线学习可以提高学习效率。基于云平台的混合学习模式可以解决传统课堂的时间浪费问题,满足学生自主学习的需求。
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引用次数: 0
Semi-supervised Semantic Segmentation Network based on Knowledge Distillation 基于知识蒸馏的半监督语义分割网络
Weizhe Wang
Semantic segmentation of complex traffic scenes is a challenging research topic in the field of computer vision. In order to reduce the dependence of the segmentation model on the pixel-level annotation data of traffic scenes, we propose a semi-supervised semantic segmentation algorithm model based on knowledge distillation. The self-correcting module is used to iteratively optimize the weakly labeled data and generate pseudo-labels. The collaborative learning of multiple students enhances the ability of students to accept potential knowledge online. The proposed method uses the knowledge distillation structure of the teacher-student network to transfer semantic structured information. It solves the problem of insufficient fine label samples in the Cityscapes dataset. The network performance obtained by training with the original label data combined with the pseudo label data can be further improved.
复杂交通场景的语义分割是计算机视觉领域一个具有挑战性的研究课题。为了减少分割模型对交通场景像素级标注数据的依赖,提出了一种基于知识蒸馏的半监督语义分割算法模型。自校正模块用于迭代优化弱标记数据并生成伪标签。多学生的协同学习增强了学生接受网络潜在知识的能力。该方法利用师生网络的知识蒸馏结构传递语义结构化信息。它解决了城市景观数据集中精细标签样本不足的问题。将原始标签数据与伪标签数据结合训练得到的网络性能可以进一步提高。
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引用次数: 2
Research on Personalized Recommendation Method Based on Multi-source Information Learning 基于多源信息学习的个性化推荐方法研究
Keqing Guan, Xianli Kong
Personalized recommendation can effectively solve the negative impact of information overload on users and improve user experience in the big data environment. How to build an effective personalized recommendation system has become a common concern of industry and academia. Based on the basic idea of multi-layer perceptron, this paper constructs a personalized recommendation model of multi-source information. By introducing the relevant information of users and recommended items, iterative learning is carried out to improve the accuracy of user preference prediction. Combined with multi-layer perceptron method, the extended model is constructed. Based on TensorFlow framework, the batch data flow method is used to train the model. The implementation framework of the method is built, and the effectiveness of the method is verified by movielens data set. Experimental results show that the proposed method can effectively improve the accuracy of user preference prediction.
个性化推荐可以有效解决大数据环境下信息过载对用户的负面影响,提升用户体验。如何构建有效的个性化推荐系统已成为业界和学术界共同关注的问题。基于多层感知器的基本思想,构建了一个多源信息的个性化推荐模型。通过引入用户和推荐项目的相关信息,进行迭代学习,提高用户偏好预测的准确性。结合多层感知器方法,构造了扩展模型。基于TensorFlow框架,采用批处理数据流方法对模型进行训练。建立了该方法的实现框架,并通过电影数据集验证了该方法的有效性。实验结果表明,该方法能有效提高用户偏好预测的准确性。
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引用次数: 0
An Adaptive Threshold Estimation for Coarse Synchronization in Transponding Satellite Communication System 卫星转发器通信系统粗同步的自适应阈值估计
Lei Chen, Chengyao Tang, Kecheng Zhang, Jingyuan Li, Weihua Mou
In transponding satellite communication (TSC) system, coarse synchronization is the key for the ground station to receive and process inbound signals, which directly affects the sensitivity of signal receiving and detection probability. The power and Doppler effect of the transmitted signal vary from terminals to terminals due to differences in positions, dynamic scenes, antenna status as well as terminal types. Furthermore, the satellite motion is variable, especially the high dynamic LEO(Low Earth Orbit) satellite communication systems in the future, whose satellite antenna beam direction changes rapidly. All these problems bring challenges to the coarse synchronization of ground station in transponding satellite communication system. At present, the ground station coarse synchronization mostly adopts the fixed threshold estimation and CFAR threshold estimation, which are not suitable for the future LEO satellite communication systems. In this paper, an adaptive threshold estimation method for inbounding signals coarse synchronization, which neither changes the framework of transponding satellite communication system nor requires additional resources, is proposed to obtain more stable acquisition sensitivity and increase the detection probability in the dynamic scene. Also, the theoretical analysis and simulations results are presented to verify this method.
在卫星转发器通信(TSC)系统中,粗同步是地面站接收和处理入站信号的关键,它直接影响信号接收的灵敏度和探测概率。由于位置、动态场景、天线状态以及终端类型的不同,终端之间发射信号的功率和多普勒效应不同。此外,卫星的运动是多变的,特别是未来高动态近地轨道卫星通信系统,其卫星天线波束方向变化很快。这些问题对卫星转发器通信系统中地面站的粗同步提出了挑战。目前,地面站粗同步多采用固定阈值估计和CFAR阈值估计,不适合未来的LEO卫星通信系统。为了在动态场景下获得更稳定的采集灵敏度和更高的检测概率,本文提出了一种不改变卫星转寄通信系统框架、不需要额外资源的入站信号粗同步自适应阈值估计方法。理论分析和仿真结果验证了该方法的有效性。
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引用次数: 0
Semantic Segmentation Based on Deeplabv3+ and Attention Mechanism 基于Deeplabv3+和注意机制的语义分割
Rongrong Liu, Dongzhi He
In this paper, we propose vertical attention and spatial attention network (VSANet), which is a semantic segmentation method based on Deeplabv3+ and attention module, for improving semantic segmentation effect for autonomous driving road scene images. The improvement of this paper is primarily on the following two aspects. One is that this paper introduces the spatial attention module (SAM) after the atrous convolution, which effectively obtains more spatial context information. Second, by studying the road scene image, it is found that there are considerable differences in the pixel-level distribution of the horizontal segmentation area in the image. For this reason, this paper introduces the vertical attention module (VAM), which can better segment the road scene image. A large number of experimental results indicate that the segmentation accuracy of the proposed model is improved by 1.94% compared with the Deeplabv3+ network model on the test dataset of Cityscapes dataset.
为了提高自动驾驶道路场景图像的语义分割效果,本文提出了一种基于Deeplabv3+和注意力模块的语义分割方法——垂直注意力和空间注意力网络(vertical attention and spatial attention network, VSANet)。本文的改进主要体现在以下两个方面。一是在亚历斯卷积之后引入空间注意模块(SAM),有效地获取了更多的空间上下文信息。其次,通过对道路场景图像的研究,发现图像中水平分割区域的像素级分布存在较大差异。为此,本文引入了垂直关注模块(vertical attention module, VAM),该模块可以更好地分割道路场景图像。大量实验结果表明,在cityscape数据集的测试数据集上,与Deeplabv3+网络模型相比,该模型的分割精度提高了1.94%。
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引用次数: 3
期刊
2021 IEEE 4th Advanced Information Management, Communicates, Electronic and Automation Control Conference (IMCEC)
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