文档介绍：中南民族大学硕士学位论文视频运动目标检测与跟踪算法的研究及其实现姓名:董蓓申请学位级别:硕士专业:通信与信息系统指导教师:谢勤岚 20090520 中南民族大学硕士学位论文 I 摘要视频运动目标检测与跟踪是数字图像处理模式识别以及计算机视觉领域研究的主要内容之一它广泛应用于安全监控虚拟现实人机交互等多个领域同时运动目标检测与跟踪具有较高的学术价值和理论意义已经成为近年来国际上研究的热点问题之一本课题设计了一个基于云台的自动检测与自动跟踪的视频监控系统该系统对动态背景下单一运动目标进行检测和提取并在视频序列中对运动目标进行跟踪其核心主要包括两个部分一是运动目标的检测与提取二是运动目标的跟踪运动目标的检测与提取是目标跟踪任务的前提如果提取的目标不正确或不完整将会对目标跟踪部分产生极大的影响甚至不能进行有效跟踪在运动目标检测部分本文采用对称差分法即三帧差分法有效地消除运动目标遮挡和避免重现纹理背景并运用最大类间方差法自适应地提取检测阈值有效地抑制了背景对目标的干扰从而精确地对运动目标进行检测和提取在运动目标跟踪部分本文主要讨论了CamShift Continuously Adaptive MeanShift Algorithm 跟踪算法它是一种基于目标颜色特征的跟踪方法该方法无参数运算速度快满足一定的实时性同时由于物体的颜色信息是物体的固有特征利用运动目标的颜色特征对运动目标进行跟踪具有一定的鲁棒性本文结合对称差分法提出改进的CamShift算法充分利用运动目标检测的结果实现了目标的自动跟踪最后将改进的CamShift算法运用到本文设计的系统中结合硬件平台控制云台的转动使目标物体始终在摄像头的视场范围内系统运行结果表明当运动目标的距离和速度在一定的范围内时能够实现实时跟踪关键词目标检测目标跟踪对称差分法 CamShift算法视频运动目标检测与跟踪算法的研究及其实现 II Abstract Moving target detection and tracking in video is an important research topic in the field of digital image processing, pattern recognition puter vision. It is extensively used in security surveillance, virtual reality, advanced user interfaces, etc. Meanwhile, moving target detection and trackingis of high academic value and theoretic significance, and has been a hot issue of international research in recent years. In the thesis, a video surveillance system based on the PTZ is designed to detect and track moving target automatically. In the system, the single moving target is firstly detected and then extracted from dynamicbackground, while the extracted target is real-time tracked in the video sequence by camera on the PTZ. This system mainly consist two parts: one is detection and extraction of moving target, the other is tracking of former is more important part. If doing with incorrect or half-baked extraction, it may affect the tracking operation seriously, even can not track the object effectively. On the detection of moving target, the three frames difference algorithm is used to remove the occlusion of moving target and prevent the reappearance of texture backgr