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2016 9th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)最新文献

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Weakly-supervised vehicle detection and classification by convolutional neural network 基于卷积神经网络的弱监督车辆检测与分类
Changyu Jiang, Bailing Zhang
Vehicle detection and vehicle type/make classification have been attracting more research in recent years. Previous methods for vehicle detection typically rely on large number of annotated training images by object bounding boxes, which is expensive and often subjective. In this paper, we propose a vehicle detection and recognition system by applying weakly-supervised convolutional neural network (CNN), with training relying only on image-level labels. Experiments were conducted on a datasets acquired from field-captured traffic surveillance cameras, with vehicle classification performance mAP 98.79% and accuracy 98.28%, and vehicle detection performance mAP 85.26%.
车辆检测和车型分类是近年来研究较多的问题。以前的车辆检测方法通常依赖于大量通过对象边界框标注的训练图像,这是昂贵的,而且往往是主观的。在本文中,我们提出了一种基于弱监督卷积神经网络(CNN)的车辆检测和识别系统,其训练仅依赖于图像级标签。在现场采集的交通监控摄像机数据集上进行实验,车辆分类性能mAP为98.79%,准确率为98.28%,车辆检测性能mAP为85.26%。
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引用次数: 10
Comparing the imaging performance of MUSIC and Linear Sampling method MUSIC与线性采样成像性能的比较
Sangwoo Kang, W. Park
The MUltiple SIgnal Classification - MUSIC - algorithm and the Linear Sampling - LS - method are fast, stable, and effective non-iterative imaging techniques in inverse scattering problem. In fact, some previous studies indicated that the linear sampling method is an extended version of MUSIC. However, numerical results in support of this assertion have not been provided. In this contribution, we compare the imaging performance of MUSIC with that of the LS method with noisy data and underpin the above assertion.
多信号分类- MUSIC -算法和线性采样- LS -方法是快速、稳定、有效的反散射成像技术。事实上,之前的一些研究表明,线性抽样方法是MUSIC的扩展版本。但是,没有提供支持这一断言的数值结果。在这篇文章中,我们比较了MUSIC与LS方法在噪声数据下的成像性能,并支持了上述断言。
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引用次数: 0
Design and implementation of the agricultural meteorological system based on machine vision and cloud platform 基于机器视觉和云平台的农业气象系统的设计与实现
Dongming Li, Meijuan Wang, Jing Gao
There are many problems in the process of agricultural production, such as high labor costs, lack of processional management, delayed disaster warning, waste of agricultural information. In order to solve these problems, we developed the Argo-meteorological system. On the base of achieving real-time monitoring of farmland and disaster warning, it focused on the implementation of the comprehensive analysis and the storage of data on cloud platform which simplified the system structure and improved the efficiency of agricultural management. To help managers understand the exact situation like the growth of crops, pests and diseases, weather, and environment, sensors and binocular imaging array were used by the low-power sensing devices to obtain data. Then the data was converged to the data center on the cloud platform to be classified and processed. Meanwhile, warning feedback was given after analyzing the collected data and the standard indicators of agricultural production. The results of processing were pushed to monitoring system on PC and then showed in real-time. The test results showed that the system could achieve stable data transmission, efficient data processing and provide massive data for data mining. The cost of system maintenance and upgrade was reduced.
农业生产过程中存在人工成本高、缺乏专业化管理、灾害预警滞后、农业信息浪费等诸多问题。为了解决这些问题,我们开发了argo气象系统。在实现农田实时监测和灾害预警的基础上,重点实现了数据在云平台上的综合分析和存储,简化了系统结构,提高了农业管理效率。为了帮助管理者了解作物生长、病虫害、天气和环境等确切情况,低功耗传感设备使用传感器和双目成像阵列来获取数据。然后将数据汇聚到云平台上的数据中心进行分类和处理。同时,通过对采集数据和农业生产标准指标的分析,给出预警反馈。处理结果被推送到PC上的监控系统,并实时显示。测试结果表明,该系统能够实现稳定的数据传输和高效的数据处理,为数据挖掘提供海量数据。降低了系统维护和升级的成本。
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引用次数: 1
A method of measuring the phase difference between two pulse signals 一种测量两个脉冲信号之间相位差的方法
Wenjian Chen, Hui Sun, Yizhe Wang, Liang Lv, Tiansi An
A method of measuring the CW pulse signal phase difference is proposed, which is able to measure the phase difference between the difference frequency wave of parametric array and the small amplitude wave with the same frequency. The method is verified by simulation experiment. The factors influencing the measurement results ware discussed, such as the sampling rate, noise and sensor position. The numerical analysis results show that the proposed method can effectively measure the phase difference between the difference frequency wave of parametric array and the small amplitude wave with the same frequency.
提出了一种测量连续波脉冲信号相位差的方法,该方法能够测量出参数阵列的差频波与同频率的小幅波之间的相位差。仿真实验验证了该方法的有效性。讨论了采样率、噪声和传感器位置等因素对测量结果的影响。数值分析结果表明,该方法能有效地测量出参数阵列差频波与同频率小幅波的相位差。
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引用次数: 1
Extent estimation of jitter based on the longest path for surveillance videos 基于最长路径的监控视频抖动程度估计
Ping Yang, Li Chen, Jing Tian
The existing video jitter detection algorithms only calculate parameters such as displacement, rotation angle, zoom scale. The lack of extent calculation of jitter leads to wrong judgments while faced with complications. To tackle the problem, the longest path based algorithm for extent estimation of jitter was proposed in this paper. First, global motion estimation was conducted by gray projection algorithm introduced local consistency of jitter. Then, ratio, frequency and amplitude of jitter were calculated according to the longest path algorithm combined with global motion parameters. Finally, the extent estimation of jitter was realized via machine learning approach on the basis of jitter parameters obtained in the last step. Experimental results demonstrate the validity and feasibility of the proposed algorithm.
现有的视频抖动检测算法仅计算位移、旋转角度、缩放比例等参数。在面对复杂情况时,缺乏对抖动程度的计算会导致判断错误。为了解决这一问题,本文提出了基于最长路径的抖动程度估计算法。首先,采用引入局部一致性抖动的灰度投影算法进行全局运动估计;然后,结合全局运动参数,采用最长路径算法计算抖动比、抖动频率和抖动幅值;最后,根据上一步得到的抖动参数,通过机器学习的方法实现抖动程度的估计。实验结果证明了该算法的有效性和可行性。
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引用次数: 1
A method of tongue image segmentation based on kernel FCM 一种基于核FCM的舌图像分割方法
Tao Xie, Chunming Xia, Fei Chen, S. Zhang, Yue Zhang
Glossoscopy is an important part of Traditional Chinese Medicine (TCM). To analyze the tongue properties objectively, we need extract the tongue region from images. This paper presents a method to segment the tongue images based on kernel FCM (Fuzzy Cluster means). Firstly we pre-processed the tongue images by gray-level integral projection. Secondly the features were extracted to form a feature vector which contained texture, color, location and other information. Then, according to the feature vectors, pixels were clustering by kernel FCM whose parameters were decided by the proposed method. Finally, according to the pixels' neighbor connection theory, the tongue region was extracted. The results show that this method to segment tongue images is effective as its average accuracy reached upto 96.42%.
舌镜检查是中医的重要组成部分。为了客观地分析舌头的特征,需要从图像中提取舌头区域。提出了一种基于核模糊聚类均值的舌形图像分割方法。首先采用灰度积分投影法对舌形图像进行预处理。其次提取特征,形成包含纹理、颜色、位置等信息的特征向量;然后,根据特征向量,采用核FCM聚类,并根据所提方法确定聚类参数;最后,根据像素的相邻连接理论提取舌区。实验结果表明,该方法对舌形图像进行分割是有效的,平均准确率达到96.42%。
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引用次数: 1
UAV flight controlling based on Kinect for Windows v2 基于Windows v2的Kinect无人机飞行控制
Mengjiao Dong, Lin Cao, Dong-Ming Zhang, Ru Guo
Microsoft Kinect is a motion sensing device that provides users friendly interfaces through natural postures and gestures. In this paper, based on Kinect v2, a system is proposed to control UAV flight, without remote control. In this system, more postures and gestures are defined, thus to easily control UAV flight, than the existing works. Furthermore, the false recognition on some postures are analyzed, meanwhile MPRA (many parameters restriction algorithm) is presented to improve the precision by imposing multiple restriction on posture recognition. The evaluation platform is built based on Kinect v2 and Ar. Drone2.0, and then the experiments are carried out, which show that the proposed system outperforms the existing works.
微软Kinect是一种动作感应设备,通过自然的姿势和手势为用户提供友好的界面。本文提出了一种基于Kinect v2的无人机飞行控制系统,无需远程控制。在该系统中,定义了更多的姿态和手势,从而比现有的工作更容易控制无人机的飞行。在此基础上,分析了某些姿态的误识别问题,提出了多参数约束算法(MPRA),通过对姿态识别施加多重约束来提高精度。基于Kinect v2和Ar. Drone2.0搭建了评估平台,并进行了实验,实验结果表明,本文提出的系统优于现有的工作。
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引用次数: 4
Image post-processing of a quad-head combined aerial camera and its surveying application 四头组合航空相机的图像后处理及其测量应用
Zhaorong Lin, Na Yao, Gaode Qin, Hongxia Cui
A quad-head combined aerial camera is first introduced in this paper. Due to its multiple center projection at each exposure station, an image post-processing procedure including camera calibration, matching, self-calibration stitching and color balancing is proposed to generate the stitched virtual image, in which the mathematical models of geometric calibration and self-calibration algorithms are primarily derived. The experiments show that the post-processing procedure has been capable of obtaining satisfying stitched virtual images. Besides, the related precisions of a 1:500 scale photogrammetry project has totally meet the requirements of national specifications of surveying and mapping.
本文首先介绍了一种四头组合航空相机。由于其在每个曝光站的多中心投影,提出了一种包括相机标定、匹配、自标定拼接和色彩平衡在内的图像后处理流程来生成拼接后的虚拟图像,其中主要推导了几何标定和自标定算法的数学模型。实验表明,该后处理程序能够获得令人满意的拼接虚拟图像。此外,1:500比例尺摄影测量项目的相关精度完全满足国家测绘规范的要求。
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引用次数: 1
An efficient all-frequency environment rendering method for mixed reality 一种高效的混合现实全频环境渲染方法
Fengquan Zhang, Yujie Zhao, Zhaowei Wang, T. Lei
Consistent illumination is an important research target in the augmented reality system. In this paper, an efficient illumination method is implemented to solve the consistent illumination problem for mixed reality application. We design and implement an all-frequency environment rendering methods based on wavelet transform, and proposed an accelerated rendering method on GPU. The environment rendering method consists of two steps, one is precomputation and the other real-time rendering. An improved shadow algorithm based on shadow map is propose, which can solve least area where light source view frustum should surround according to the relationship of view frustum in eye space and terrain. In the end, we develop a mixed reality system for aircraft design based on the research results of all the work above which realize the illumination and shadow effects on the virtual aircraft. It can be used to assess how the weather impact on the operating.
一致照明是增强现实系统中的一个重要研究目标。本文提出了一种有效的照明方法来解决混合现实应用中的一致性照明问题。设计并实现了一种基于小波变换的全频环境渲染方法,并提出了一种基于GPU的加速渲染方法。环境渲染方法分为预计算和实时渲染两步。提出了一种改进的基于阴影映射的阴影算法,根据视锥体在眼空间与地形的关系,求解光源视锥体应包围的最小区域。最后,在以上研究成果的基础上,我们开发了一个用于飞机设计的混合现实系统,实现了虚拟飞机的照明和阴影效果。它可以用来评估天气对操作的影响。
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引用次数: 1
Averaging video sequences to improve action recognition 平均视频序列以提高动作识别
Zhen Gao, Guoliang Lu, Peng Yan
Sequence matching/alignment based scheme has been common for action recognition. Such a typical scheme, however, requires tremendous amounts of computation when the volume of prototypical action videos is large and easily causes mismatching for border-isolated samples in action categories. In this paper, we propose a framework of averaging video sequences based on multi-dimensional dynamic time warping (MD-DTW) and propose to use the resulting average actions, instead of prototypical action videos, for action recognition. Experimental results show that 1) average actions were shown to be more discriminative than prototypical video sequences for action modeling, and 2) action recognition using average actions rather than using prototypical action videos is much more efficient and advanced.
基于序列匹配/对齐的方案是常用的动作识别方案。然而,当典型动作视频的体积很大时,这种典型方案需要大量的计算,并且容易导致动作类别中边界隔离样本的不匹配。在本文中,我们提出了一个基于多维动态时间扭曲(MD-DTW)的平均视频序列框架,并提出使用所得的平均动作来代替原型动作视频进行动作识别。实验结果表明:1)在动作建模中,平均动作比原型视频序列具有更强的判别能力;2)使用平均动作进行动作识别比使用原型动作视频进行动作识别更高效、更先进。
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引用次数: 1
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2016 9th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics (CISP-BMEI)
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