基于计算机视觉的高空抛物检测系统设计与实现

华中科技大学硕士学位论文

Abstract

High altitude parabolic is called "the pain hanging over the city", because it has become more frequent in recent years, and its damage continues to increase with the increasing number of buildings and the floor levels. In order to solve the high altitude parabolic disputes properly, this paper proposed a real-time intelligent system for the high altitude parabolic detection and positioning through the computer vision technology.

High altitude parabolic detection system is one of the applications of the intelligent video surveillance system for monitoring the toss behavior, locating the event location and alarming in real time. It includes technologies such as image preprocessing, moving target detection, moving target tracking, target behavior recognition, and parabolic determination.

Firstly, the image was processed by image grayness and median filter to remove salt and pepper noise. Then, methods were proposed for detecting targets and tracking targets which are high altitude parabolic targets by comparing methods of moving object detection and moving target tracking. The improved ViBe algorithm solved camera sloshing and slow background changes, achieved real-time detection. The improved tracking method based on Kalman Filter had good tracking effect on high altitude parabolic targets, eliminated some non-high altitude parabolic objects, and improved the efficiency of high altitude parabolic determination. In the end, a method of target behavior recognition based on curve fitting was proposed through prior knowledge of high altitude parabolic motion. It achieved goals of high altitude parabolic target recognition and high altitude parabolic position estimation.

At last, the system was implemented, which was designed with factory pattern and singleton pattern, etc. And the synchronization control between modules is carried out by producer-consumer model. Finally, detection effect has reached 90% accuracy on average, through the field test and analysis of the parabolic detection system at high altitude.

Keywords: high altitude parabolic, moving target detection, moving target tracking, target behavior recognition, producer-consumer model

华中科技大学硕士学位论文

摘要··············································································I Abstract ···········································································II 第1章绪论

1.1 课题背景及意义 (1)

1.2 课题国内外现状 (2)

1.3 课题主要工作与结构安排 (5)

第2章高空抛物检测需求分析与系统设计

2.1 高空抛物检测需求分析 (7)

2.2 硬件系统设计 (8)

2.3 软件系统设计 (10)

2.4 本章小结 (12)

第3章高空抛物检测方法研究

3.1 高空抛物检测方法的总路线 (13)

3.2 图像预处理方法 (13)

3.3 运动目标检测方法 (15)

3.4 运动目标追踪方法 (30)

3.5 高空抛物判定方法 (38)

3.6 本章小结 (40)

第4章高空抛物检测系统实现

4.1 图像采集模块 (41)

4.2 运动目标检测模块 (43)

4.3 运动目标追踪模块 (47)

4.4 多摄像头协同分析抛物判定与结果显示 (50)

4.5 抛物视频保存与回放 (52)

4.6 本章小结 (52)

第5章高空抛物检测系统测试

5.1 高空抛物运动检测测试 (53)

5.2 多目标运动目标追踪测试 (53)

5.3 高空抛物检测系统试验结果 (54)

5.4 本章小结 (55)

华中科技大学硕士学位论文

第6章总结与展望

6.1 工作总结 (56)

6.2 未来研究方向 (57)

致谢 (58)

参考文献 (59)