基于DSP的全景视频多目标实时检测

全景视频由于具有360?的视角,非常适合用于智能视频监控中的多目标检测。首先介绍了以DSP处理器为核心的系统处理平台;接着介绍了全景图像的展开算法和MHOEI多目标检测算法;然后针对全景展开设计了适合DSP平台的分块查表展开方法,针对MHOEI设计了降分辨率处理方法;最后在DSP处理器上进行了优化实现。实验表明,在所选的DM6437处理器上,将720×576大小的全景图像展开为896×180大小的目标图像,展开帧率可达120帧每秒;再经过多目标检测后能达到平均35帧每秒,满足实时要求,同时能有效检测出全景视频中的运动和静止目标。

基于全方位视觉的多目标跟踪技术

为了快速准确地检测并跟踪多目标对象,提出了一种基于全方位视觉的多目标对象跟踪方法.首先采用全方位视觉传感器(ODVS)实时地采集现场360°全景视频图像;接着融合运动历史图像算法(MHI)和运动能量算法(MEI)实现了快速高效的MHoEI(Motion History or Energy Images)自动跟踪算法,对多目标对象进行检测和跟踪;最后,本文采用面向对象技术融合目标对象进行匹配跟踪实验结果表明本文提出的方法能较好地跟踪多目标对象,具有鲁棒性高、运算量小、便于硬件实现、高效等优点.

基于全方位视觉的独居老人监护系统

现有的独居老人监护系统存在算法复杂度高、监护效率低、不能保护老人日常隐私等问题。为此,提出一种基于全方位视觉的独居老人监护系统。利用全方位视觉传感器(ODVS)获取老人的全景视频图像,设计运动历史/能量图像算法用于目标跟踪,根据ODVS的成像特点,采用与ODVS距离位置不同的人体模型实现姿态识别,建立家庭空间与环境要素之间的映射关联,以提高行为检测的鲁棒性和可靠性,并通过ODVS标定和人体对象跟踪获得老人的活动量信息。实验结果表明,该系统的鲁棒性和实时性较强,检测准确率较高,能满足独居老人监护的需要。

Intelligent Video Surveillance System for Elderly People Living Alone Based on ODVS

Intelligent video surveillance for elderly people living alone using Omni-directional Vision Sensor (ODVS) is an important application in the field of intelligent video surveillance. In this paper, an ODVS is utilized to provide a 360° panoramic image for obtaining the real-time situation for the elderly at home. Some algorithms such as motion object detection, motion object tracking, posture detection, behavior analysis are used to implement elderly monitoring. For motion detection and object tracking, a method based on MHoEI(Motion History or Energy Images) is proposed to obtain the trajectory and the minimum bounding rectangle information for the elderly. The posture of the elderly is judged by the aspect ratio of the minimum bounding rectangle. And there are the different aspect ratios in accordance with the different distance between the object and ODVS. In order to obtain activity rhythm and detect variously behavioral abnormality for the elderly, a detection method is proposed using time, space, environment, posture and action to describe, analyze and judge the various behaviors of the elderly in the paper. In addition, the relationship between the panoramic image coordinates and the ground positions is acquired by using ODVS calibration. The experiment result shows that the above algorithm can meet elderly surveillance demand and has a higher recognizable rate.

基于全方位视觉的自动门安全和节能检测技术

针对自动门运行过程中的效率及安全问题,提出了一种基于全方位视觉传感器(ODVS)的自动门安全和节能智能检测技术。首先,采用ODVS采集自动门周边的360°全景图,并对全景图像按检测要求进行预处理;接着,采用一种运动历史/能量图像(MHoEI)算法来检测和跟踪运动目标前景对象;然后,根据前景对象的运动方向和空间位置等信息来分析行人的行为;最后,根据行人的行为和状态来控制自动门的开启和关闭,以达到自动门安全性、节能性和舒适性的控制目标。实验结果表明,该检测方法能有效地识别自动门周围的行人行为,有助于避免各种自动门安全隐患发生,同时能高精度统计出进出自动门的人流量。