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采用运动图像处理检测排种器充填性能 被引量:22
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作者 胡少兴 马成林 +2 位作者 张爱武 马旭 张军 《农业工程学报》 EI CAS CSCD 北大核心 2000年第5期56-59,共4页
针对人工测量和光电检测排种器性能的弊端 ,提出了采用运动图像处理检测排种器充填性能的方法。研制了检测多目标高速运动物体 (种子 )计算机图像处理系统 ,分析了光照对抓拍运动物体的影响和图像的采集过程 ,给出了系统的拍摄区域和合... 针对人工测量和光电检测排种器性能的弊端 ,提出了采用运动图像处理检测排种器充填性能的方法。研制了检测多目标高速运动物体 (种子 )计算机图像处理系统 ,分析了光照对抓拍运动物体的影响和图像的采集过程 ,给出了系统的拍摄区域和合理的图像处理窗口 ,并运用最佳熵门限法准确提取目标和背景 ,建立了根据种子边缘、面积及种子之间的距离检测排种器充填性能的适用算法。试验表明 :采用该系统误差小 。 展开更多
关键词 计算机视觉 运动图像处理 种子 排种器 检测
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改进遗传算法在差分像运动图像实时处理中的应用 被引量:2
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作者 杜卓明 耿国华 +1 位作者 徐鹏 汪建业 《模式识别与人工智能》 EI CSCD 北大核心 2012年第5期879-884,共6页
差分像运动图像的处理是大气相干长度测量的关键环节,而大气相干长度测量通常需要实时获取数据.因此,差分像运动图像的处理速度与测量仪器的性能有直接的联系.为提高大气相干长度仪的实时测量能力,根据差分像运动图像的特点设计一种改... 差分像运动图像的处理是大气相干长度测量的关键环节,而大气相干长度测量通常需要实时获取数据.因此,差分像运动图像的处理速度与测量仪器的性能有直接的联系.为提高大气相干长度仪的实时测量能力,根据差分像运动图像的特点设计一种改进的遗传算法,对目标光斑进行快速识别.改进的遗传算法为提高收敛速度,取消交叉算子,同时为避免早熟收敛,改进染色体结构,使其在仅使用变异算子的情况下仍具有全局探索能力.Schaf-fer函数模拟寻优实验验证该方法的可行性.使用改进遗传算法的大气相干长度仪实现实时快速测量. 展开更多
关键词 图像处理 遗传算法 差分像运动图像 大气相干长度
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体育计算:一个新的计算机应用研究领域 被引量:9
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作者 赵会群 孙晶 《计算机科学》 CSCD 北大核心 2004年第8期89-92,共4页
给出体育计算的定义,按照应用研究领域综述体育计算的研究现状、需要进一步解决的技术问题和解决问题的思路。介绍了视频点播技术在大型体育赛会的应用现状,提出一种适合大型体育赛会需求的视频点播方案,并介绍一个能够满足这种需求的... 给出体育计算的定义,按照应用研究领域综述体育计算的研究现状、需要进一步解决的技术问题和解决问题的思路。介绍了视频点播技术在大型体育赛会的应用现状,提出一种适合大型体育赛会需求的视频点播方案,并介绍一个能够满足这种需求的视频点播原型系统的功能特点。介绍球类临场技战术统计分析软件的设计与实现方法,提出比赛过程以脚本划分的数据模型,从而有效地简化数据采集的数量。概述运动图像处理的技术,结合体育运动项目,提出需要解决的一些实际问题以及解决问题的方法。 展开更多
关键词 体育计算 视频点播 比赛分析 运动图像处理
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基于CNN-PID的竞赛机器人赛道识别与自主驾驶 被引量:3
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作者 张施皛 唐天宇 +3 位作者 张志明 马国荣 高贺惟 余有灵 《实验技术与管理》 CAS 北大核心 2020年第9期39-43,48,共6页
根据仿人视觉机器人竞赛项目的要求,设计并实现基于CNN-PID算法的赛道识别及自主驾驶机器人系统,将机器视觉和运动控制相互融合,采用CSI接口摄像头获取图像信息,运用卷积神经网络处理采集的数据,使用PID算法进行机器人的运动控制。最终... 根据仿人视觉机器人竞赛项目的要求,设计并实现基于CNN-PID算法的赛道识别及自主驾驶机器人系统,将机器视觉和运动控制相互融合,采用CSI接口摄像头获取图像信息,运用卷积神经网络处理采集的数据,使用PID算法进行机器人的运动控制。最终测试结果表明:以此方案进行图像处理与运动规划的机器人从启动区开始运行,经过若干弯道与迷彩地形,均可正确识别赛道并正常驾驶,最后在停止禁入区前减速、停止并击打靶标,顺利完成基于单目视觉的智能驾驶、定点停止和击打动作的任务要求,具有较强的稳定性与可拓展性。 展开更多
关键词 仿人视觉 卷积神经网络 图像处理运动规划 赛道识别 自动驾驶
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Background Subtraction and Frame Difference Based Moving Object Detection for Real-Time Surveillance 被引量:5
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作者 黄中文 戚飞虎 岑峰 《Journal of Donghua University(English Edition)》 EI CAS 2003年第1期15-19,共5页
A new real-time algorithm is proposed in this paperfor detecting moving object in color image sequencestaken from stationary cameras.This algorithm combines a temporal difference with an adaptive background subtractio... A new real-time algorithm is proposed in this paperfor detecting moving object in color image sequencestaken from stationary cameras.This algorithm combines a temporal difference with an adaptive background subtraction where the combination is novel.Ⅷ1en changes OCCUr.the background is automatically adapted to suit the new conditions.Forthe background model,a new model is proposed with each frame decomposed into regions and the model is based not only upon single pixel but also on the characteristic of a region.The hybrid presentationincludes a model for single pixel information and a model for the pixel’s neighboring area information.This new model of background can both improve the accuracy of segmentation due to that spatialinformation is taken into account and salientl5r speed up the processing procedure because porlion of neighboring pixel call be selected into modeling.The algorithm was successfully used in a video surveillance systern and the experiment result showsit call obtain a clearer foreground than the singleframe difference or background subtraction method. 展开更多
关键词 video surveillance background subtraction frame differencing
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3D Motion Parameters Determination Based on Binocular Sequence Images 被引量:1
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作者 ZHANG Jianqing ZHANG Chunsen HE Shaojun 《Geo-Spatial Information Science》 2006年第1期32-37,共6页
Exactly capturing three dimensional (3D) motion i nf ormation of an object is an essential and important task in computer vision, and is also one of the most difficult problems. In this paper, a binocular vision s yst... Exactly capturing three dimensional (3D) motion i nf ormation of an object is an essential and important task in computer vision, and is also one of the most difficult problems. In this paper, a binocular vision s ystem and a method for determining 3D motion parameters of an object from binocu lar sequence images are introduced. The main steps include camera calibration, t he matching of motion and stereo images, 3D feature point correspondences and re solving the motion parameters. Finally, the experimental results of acquiring th e motion parameters of the objects with uniform velocity and acceleration in the straight line based on the real binocular sequence images by the mentioned meth od are presented. 展开更多
关键词 binocular sequence image camera calibration image matching motion parameter
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Fast Motion Estimation Algorithm with Edge Alignment for H.264 Encoder
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作者 Rastislav Adamek Gabriela Andrejkova 《Computer Technology and Application》 2013年第7期341-345,共5页
Image sequences processing and video encoding are extremely time consuming problems. The time complexity of them depends on image contents. This paper presents an estimation of a block motion method for video coding w... Image sequences processing and video encoding are extremely time consuming problems. The time complexity of them depends on image contents. This paper presents an estimation of a block motion method for video coding with edge alignment. This method uses blocks of size 4 × 4 and its basic idea is to find motion vector using the edge position in each video coding block. The method finds the motion vectors more accurately and faster than any known classical method that calculates all the possibilities. Our presented algorithm is compared with known classical algorithms using the evaluation function of the peak signal-to-noise ratio. For comparison of the methods we are using parameters such as time, CPU usage, and size of compressed data. The comparison is made on benchmark data in color format YUV. Results of our proposed method are comparable and in some cases better than results of standard classical algorithms. 展开更多
关键词 Codec H.264 ENCODER edge detection EVO (Enabling Virtual Organizations) conference system.
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体育计算研究综述 被引量:1
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作者 赵会群 邵恒忠 +2 位作者 顾震 孙晶 金季春 《北京体育大学学报》 CSSCI 北大核心 2007年第12期1673-1676,共4页
在明确体育计算相关概念之后,综述体育计算研究现状。通过两个研究领域的研究工作,提出目前体育计算中需要解决的问题和关键技术,其一是体育比赛技战术分析;其二是技术动作的图像处理。最后,介绍了作者完成的一些研究工作。
关键词 体育计算 体育比赛分析 运动图像处理
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Experiment and analysis on microscopic characteristics of pedestrian movement in building bottleneck 被引量:4
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作者 TIAN Wei SONG WeiGuo +1 位作者 LU Wei FANG ZhiMing 《Science China(Technological Sciences)》 SCIE EI CAS 2011年第7期1730-1736,共7页
In this paper, evacuation experiments are carried out to study pedestrian movement behaviors in building bottleneck. An image processing method based on mean-shift algorithm is used to extract pedestrian movement traj... In this paper, evacuation experiments are carried out to study pedestrian movement behaviors in building bottleneck. An image processing method based on mean-shift algorithm is used to extract pedestrian movement trajectory. Based on the extracted trajectory, we analyze the microscopic movement characteristics of pedestrians such as lane formation, change of velocity and distance between two sequential pedestrians. A pedestrian lane is a group of pedestrians moving in a column. The lane formation is verified by the pedestrian trajectory and distribution of pedestrian’s lateral positions (x direction in the paper): lane number changes from one to two, three or even more with the increasing bottleneck width when pedestrians pass through the bottleneck. By analyzing the pedestrian movement behaviors in the same pedestrian lane, we find three typical movement modes in the bottleneck: time-lag acceleration, synchronous acceleration, and avoiding deceleration. Through analyzing the time intervals when successive pedestrians pass through the bottleneck, we find that most pedestrians adjust their velocities according to the distance to the forward pedestrians. Results also indicate that due to different cultures, pedestrians flux in China and Germany may have some differences besides their similarities. 展开更多
关键词 EVACUATION TRAJECTORY Mean-shift algorithm pedestrian lane time interval
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