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2018 IEEE 3rd International Conference on Image, Vision and Computing (ICIVC)最新文献

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NCC Feature Matching Optimized Algorithm Based on Constraint Fusion 基于约束融合的NCC特征匹配优化算法
Pub Date : 2018-06-01 DOI: 10.1109/ICIVC.2018.8492802
J. Sun, Yuan Liu, Yu Ding, Xinglong Zhu, J. Xi
In this paper, a binocular stereo vision three-dimensional (3D) reconstruction algorithm is proposed. In order to reduce the computation in feature extraction process, it begins with selecting candidate corner points, and then uses this as the center to establish the search area. Finally, scale invariant feature transform (SIFT) algorithm is used to extract corner points. In the process of stereo matching, the rough matching point pairs obtained from the Normal Cross Correlation (NCC) algorithm are applied to feature constraints to get the precise matching point pairs so that the final experiment realizes the 3D reconstruction of objects.
提出了一种双目立体视觉三维重建算法。为了减少特征提取过程中的计算量,首先选取候选角点,然后以此为中心建立搜索区域。最后,采用尺度不变特征变换(SIFT)算法提取角点。在立体匹配过程中,将正态相互关联(NCC)算法得到的粗匹配点对应用于特征约束,得到精确匹配点对,最终实验实现物体的三维重建。
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引用次数: 3
Overview on Moving Target Network Defense 移动目标网络防御概述
Pub Date : 2018-06-01 DOI: 10.1109/ICIVC.2018.8492800
Xuan Zhou, Yuliang Lu, Yongjie Wang, Xuehu Yan
Moving Target Defense (MTD) is a research hotspot in the field of network security. Moving Target Network Defense (MTND) is the implementation of MTD at network level. Numerous related works have been proposed in the field of MTND. In this paper, we focus on the scope and area of MTND, systematically present the recent representative progress from four aspects, including IP address and port mutation, route mutation, fingerprint mutation and multiple mutation, and put forward the future development directions. Several new perspectives and elucidations on MTND are rendered.
移动目标防御(MTD)是网络安全领域的研究热点。移动目标网络防御(MTND)是移动目标网络防御在网络层面的实现。在MTND领域已经提出了许多相关的工作。本文围绕MTND的范围和领域,从IP地址和端口突变、路由突变、指纹突变和多重突变四个方面系统地介绍了MTND的最新代表性进展,并提出了未来的发展方向。对MTND提出了一些新的观点和阐释。
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引用次数: 11
Partitioned Logarithmic Tone Mapping Algorithm with Detail Compensation 带有细节补偿的分割对数色调映射算法
Pub Date : 2018-06-01 DOI: 10.1109/ICIVC.2018.8492770
Jialin Liu, Y. Liu, Weihua Liu, Tingge Zhu
We present a partitioned logarithmic tone mapping algorithm with detailed compensation. First, the High Dynamic Range (HDR) image is divided into a base layer and a detail layer. Then, different adaptive logarithmic functions are proposed for the low, medium, and high luminance regions in the base layer. At last, a pixel-level fusion algorithm is used to eliminate the boundary effect of each region. We also propose an adaptive function to adjust the detail layer. Experimental results show that our algorithm can effectively compress the dynamic range, the image details after tone mapping are more abundant and the color saturation is higher.
提出了一种带详细补偿的分区对数色调映射算法。首先,将高动态范围(HDR)图像划分为基础层和细节层。然后,针对底层的低、中、高亮度区域提出了不同的自适应对数函数。最后,采用像素级融合算法消除各区域的边界效应。我们还提出了一个自适应函数来调整细节层。实验结果表明,该算法能够有效压缩动态范围,色调映射后的图像细节更加丰富,色彩饱和度更高。
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引用次数: 0
An Extension of Temporal Mechanism for Graph Grammar 图语法时间机制的扩展
Pub Date : 2018-06-01 DOI: 10.1109/ICIVC.2018.8492900
Zhan Shi, Jiande Zhang, Tingting Zhang, Xiaoqin Zeng, Dawei Li
Graph grammars are a rigorous but intuitive way to define and handle graph languages. To tackle time-related issues, this paper proposes a new extension of temporal mechanism based on the existing Edge-based Graph Grammar (EGG), which includes grammatical specifications, productions, operations and so on. In the paper, formal definitions of temporal mechanism are provided first. Then, a new parsing algorithm is presented to check the correctness of a given graph's structure, and to analyze operations' timing when needed.
图语法是定义和处理图语言的一种严格但直观的方法。为了解决时间相关的问题,本文在现有的基于边缘的图语法(EGG)的基础上,提出了一种新的时间机制扩展,包括语法规范、生成、操作等。本文首先给出了时间机制的形式化定义。然后,提出了一种新的分析算法来检查给定图结构的正确性,并在需要时分析操作的时序。
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引用次数: 0
A Fast Iterative Shrinkage Thresholding Algorithm for Single Particle Reconstruction of Cryo-EM 低温电镜单粒子重构的快速迭代收缩阈值算法
Pub Date : 2018-06-01 DOI: 10.1109/ICIVC.2018.8492730
Huan Pan, You Wei-wen, T. Zeng
Single particle reconstruction (SPR) from cryo-electron microscopy (cryo-EM) is an emerging technique for determining the three-dimensional (3D) structure of macromolecules. A major challenge in single particle reconstruction from cryo-electron microscopy is to establish a reliable ab initio three-dimensional model using two-dimensional projection images. In this paper we introduce a fast proximal gradient method (FISTA) to solve the corresponding optimization problem of Single particle reconstruction. Numerical experiments with simulated images demonstrate that the proposed methods significantly reduce the estimation error and improved reconstruction quality.
低温电子显微镜(cryo-EM)单粒子重建(SPR)是一种新兴的测定大分子三维结构的技术。低温电子显微镜单粒子重建的一个主要挑战是利用二维投影图像建立可靠的从头计算三维模型。本文引入一种快速近端梯度法(FISTA)来解决相应的单粒子重构优化问题。模拟图像的数值实验表明,该方法显著降低了估计误差,提高了重建质量。
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引用次数: 3
Application of the Generalized Demodulation Time-Frequency Analysis Method to Vibration Signals Under Varying Speed 广义解调时频分析方法在变转速振动信号中的应用
Pub Date : 2018-06-01 DOI: 10.1109/ICIVC.2018.8492762
Yan Li, Liping Du
Instantaneous frequency is a primary parameter used for analyzing vibration signals of rolling bearings under harsh working conditions, which contains rich information besides the rotating speeds of the shaft. Such vibration signals exhibits characteristics of non-stationary and multi-components. The generalized demodulation time-frequency analysis approach is a novel signal processing method, which is suitable for processing non-stationary and multi-component signals. Its novelty lies in that the signal whose time-frequency distributions are curved paths can be transformed into that whose time-frequency distributions are linear paths paralleling time axis by using generalized demodulation. In this paper, to deal with the vibration signals under variable working speed condition, the generalized demodulation as well as a band-pass filter is used to separate the interested component from original vibration signal. The analysis results demonstrate the validity of the proposed approach.
瞬时频率是分析滚动轴承在恶劣工况下振动信号的主要参数,它除了包含轴的转速信息外,还包含丰富的信息。这种振动信号具有非平稳和多分量的特点。广义解调时频分析方法是一种新的信号处理方法,适用于处理非平稳和多分量信号。它的新颖之处在于,通过广义解调,可以将时频分布为曲线路径的信号转换为时频分布为平行时间轴的线性路径信号。本文针对变转速工况下的振动信号,采用广义解调和带通滤波器相结合的方法将感兴趣的分量从原振动信号中分离出来。分析结果表明了该方法的有效性。
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引用次数: 0
An Intelligent Composite Pose Estimation Algorithm Based on 3D Multi-View Templates 基于三维多视图模板的智能复合姿态估计算法
Pub Date : 2018-06-01 DOI: 10.1109/ICIVC.2018.8492773
L. Yaxin, Teng Yiqian, Zhong Ming
For service robots, intelligent grasping is a core step to accomplish lots of household tasks. The spatial pose estimation of target object is the prerequisite to calculate the grasping pose of manipulator and perform the intelligent grasping. This paper proposes a composite algorithm to estimate the pose of target whose templates obtained from multiple views. With the premise of successful grasping, we divide the household items into two categories based on the difference of the demanded pose accuracy, and use different algorithms to estimate the pose of two categories. For the object with high demanded pose accuracy, an improved pose estimation algorithm is proposed, which combines template-selected method based on VFH and point cloud registration algorithm of key points. Finally, the whole pose estimation algorithm is evaluated by grasping experiments. The result indicates that: when the template is extracted from only 12 views, the success rate of grasping is over 90%., and the average estimation time of the two kinds of objects are 254.9ms and 984.2ms respectively. In conclusion, the algorithm takes into account of the requirement of both accuracy and calculation speed for intelligent grasping based on sparse multi-view templates.
对于服务机器人来说,智能抓取是完成大量家务的核心步骤。目标物体的空间姿态估计是机械臂抓取姿态计算和智能抓取的前提。本文提出了一种多视图模板目标姿态估计的复合算法。在抓取成功的前提下,根据所要求的姿态精度的不同,将家居物品分为两类,并使用不同的算法对两类物品进行姿态估计。针对姿态精度要求较高的目标,提出了一种改进的姿态估计算法,该算法将基于VFH的模板选择方法与关键点点云配准算法相结合。最后,通过抓取实验对整个姿态估计算法进行了评价。结果表明:仅从12个视图中提取模板时,抓取成功率在90%以上。,两类目标的平均估计时间分别为254.9ms和984.2ms。综上所述,该算法兼顾了基于稀疏多视图模板的智能抓取对精度和计算速度的要求。
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引用次数: 0
Finger Vein Recognition Based on Feature Point Distance 基于特征点距离的手指静脉识别
Pub Date : 2018-06-01 DOI: 10.1109/ICIVC.2018.8492806
Jiacun Wu, Dongzhi He
In recent years, finger vein recognition has been favored by more and more researchers because of its high recognition accuracy, security and convenience of collection. The rotation of the finger will reduce the recognition performance. This paper first correction the collected images through the smallest circumscribed rectangle, then extracts the region of interest according to the location of finger joints, and extracts vein features based on Niblack algorithm. Finally, the intersection points and endpoints of the veins are identified, and an modified Hausdorff distance algorithm (MHD) is used to identify. The experiment shows that the rotation average time and the extraction time of the venous feature of each picture are 8ms and 146ms, respectively. The accuracy of the non image rotation correction is 94.12%, and the accuracy of the image rotation correction is 97.21%, and the algorithm is robust to the rotation angle. It can be concluded that the algorithm has a high advantage in running speed and matching precision
近年来,手指静脉识别以其识别精度高、安全性好、采集方便等优点受到越来越多研究者的青睐。手指的旋转会降低识别性能。本文首先对采集到的图像进行最小边界矩形的校正,然后根据手指关节的位置提取感兴趣的区域,并基于Niblack算法提取静脉特征。最后,利用改进的豪斯多夫距离算法(Hausdorff distance algorithm, MHD)对纹理的交点和端点进行识别。实验表明,每张图片的旋转平均时间为8ms,静脉特征提取时间为146ms。非图像旋转校正精度为94.12%,图像旋转校正精度为97.21%,且算法对旋转角度具有鲁棒性。结果表明,该算法在运行速度和匹配精度方面具有较高的优势
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引用次数: 3
Gaussian Noise Filtering Using Pulse-Coupled Neural Networks 基于脉冲耦合神经网络的高斯噪声滤波
Pub Date : 2018-06-01 DOI: 10.1109/ICIVC.2018.8492782
Ke Liu, Keming Long, Baozhen Ma, Jing Yang
In the process of collecting or transmitting images, various noise interferences are often introduced, especially in a multi-image sensor network, and noise has an important influence on subsequent image processing. Gaussian noise is a common noise in such systems. In order to filter Gaussian noise better, the neighborhood gray level difference weight matrix is proposed and applied to the Pulse-coupled neural network (PCNN). The matrix corresponds to the coupling-connection matrix of the PCNN and is determined by the related constraint relationship. From the perspective of image pixels, the neighborhood gray level difference weight matrix can adaptively change the gray level of the noisy pixels in the center of the neighborhood and improve the correlation of pixel gray levels in the neighborhood. From the macro perspective, the introduction of the neighborhood gray level difference weight matrix converts the image denoising process into a two-dimensional convolution operation. When the initial conditions are determined, parallel processing can be realized, which greatly improves the efficiency of the algorithm. These advantages make the proposed algorithm can be better combined with CNN and other networks as the front-end denoising module of these networks. The specific experiments show that the denoising effect of this algorithm is better, especially under the higher variance Gaussian noise.
在采集或传输图像的过程中,经常会引入各种噪声干扰,特别是在多图像传感器网络中,噪声对后续的图像处理有重要影响。高斯噪声是这类系统中常见的噪声。为了更好地过滤高斯噪声,提出了邻域灰度差权矩阵,并将其应用于脉冲耦合神经网络(PCNN)。该矩阵对应于PCNN的耦合连接矩阵,由相关约束关系决定。从图像像素的角度来看,邻域灰度差权矩阵可以自适应改变邻域中心噪声像素的灰度值,提高邻域像素灰度值的相关性。从宏观角度来看,邻域灰度差权矩阵的引入将图像去噪过程转化为二维卷积运算。当初始条件确定后,可以实现并行处理,大大提高了算法的效率。这些优点使得本文算法可以更好的与CNN等网络结合,作为这些网络的前端去噪模块。具体实验表明,该算法的去噪效果较好,特别是在方差较大的高斯噪声下。
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引用次数: 0
An Automatic Liver Segmentation Algorithm for CT Images U-Net with Separated Paths of Feature Extraction 基于分离路径特征提取的CT图像自动肝脏分割算法
Pub Date : 2018-06-01 DOI: 10.1109/ICIVC.2018.8492721
Lu Zhang, Li Xu
In this paper, a fully convolutional neural network based on U-net is proposed to segment the liver in CT images. Two modifications are made to the original U-net structure. Firstly, an extra path is added to the original net structure to extract the global features and detail features separately. Secondly, the number of convolutional channels of the original contraction path, the original expansion path and the new path is reduced. These two modifications make the training more rapid and improve the efficiency of the convolution kernel extraction feature. Then, the segmentation results before and after modification is compared in terms of performance, including recall rate and precision rate, to ensure that the modified network can reach even higher than the original network precision. After that, the paper analyzes the reasons why our network can maintain good segmentation effect and summarizes the application prospect of the modified network.
本文提出了一种基于U-net的全卷积神经网络来分割CT图像中的肝脏。对原有的U-net结构进行了两处修改。首先,在原有的网络结构上增加一条额外的路径,分别提取全局特征和细节特征;其次,减少原收缩路径、原扩展路径和新路径的卷积通道数;这两种改进使得训练速度更快,提高了卷积核提取特征的效率。然后,对修改前后的分割结果进行性能比较,包括召回率和准确率,以确保修改后的网络可以达到甚至高于原始网络的精度。然后,分析了我们的网络能够保持良好分割效果的原因,总结了改进后的网络的应用前景。
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引用次数: 7
期刊
2018 IEEE 3rd International Conference on Image, Vision and Computing (ICIVC)
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