为弥补传统监控视野范围固定缺陷,并实现运动人体实时监控,采用图像处理方法,设计了一个基于数字信号处理器件(Digital Signal Processor,DSP)车载摄像头运动人体小车跟随系统。采用帧间差分法检测识别运动人体,提出一个基于灰度直方图...为弥补传统监控视野范围固定缺陷,并实现运动人体实时监控,采用图像处理方法,设计了一个基于数字信号处理器件(Digital Signal Processor,DSP)车载摄像头运动人体小车跟随系统。采用帧间差分法检测识别运动人体,提出一个基于灰度直方图的连续自适应均值漂移运动人体跟随算法,通过计算运动人体反向投影图的0阶矩阵和1阶矩阵,求出运动人体的质心坐标和宽度,作为下一帧跟踪框位置和大小。实验结果表明:电荷耦合器件摄像头采集的运动人体图像在DSP进行检测识别和跟随处理,正确地获得左转、右转、前进和后退等四个驱动信号,驱动小车跟随运动人体。实地测试表明:该系统能够实现对运动人体目标左右前后跟随,并时刻与运动人体保持一定安全距离。展开更多
A modified random walk model for human motion is proposed to investigate characteristics of 60GHz indoor office propagation.Compared with the classic random walk model,the movement tendency in the walking process is t...A modified random walk model for human motion is proposed to investigate characteristics of 60GHz indoor office propagation.Compared with the classic random walk model,the movement tendency in the walking process is taken into account in the modified model.Based on the proposed model,path gains of the propagation environment are simulated under a variety of settings by using a ray tracing method.Simulation results and analysis show that human motion is a major source of disturbance to the indoor office propagation and results in performance degradation in some areas.展开更多
文摘为弥补传统监控视野范围固定缺陷,并实现运动人体实时监控,采用图像处理方法,设计了一个基于数字信号处理器件(Digital Signal Processor,DSP)车载摄像头运动人体小车跟随系统。采用帧间差分法检测识别运动人体,提出一个基于灰度直方图的连续自适应均值漂移运动人体跟随算法,通过计算运动人体反向投影图的0阶矩阵和1阶矩阵,求出运动人体的质心坐标和宽度,作为下一帧跟踪框位置和大小。实验结果表明:电荷耦合器件摄像头采集的运动人体图像在DSP进行检测识别和跟随处理,正确地获得左转、右转、前进和后退等四个驱动信号,驱动小车跟随运动人体。实地测试表明:该系统能够实现对运动人体目标左右前后跟随,并时刻与运动人体保持一定安全距离。
基金Supported by the National Natural Science Foundation of China(61172073)Program for New Century Excellent Talents of the Ministry of Education(NCET-12-0766)+1 种基金the Open Research Fund of National Mobile Communications Research Laboratory,Southeast University(2012D19)the Fundamental Research Funds for the Central Universities(2013JBZ001)
文摘A modified random walk model for human motion is proposed to investigate characteristics of 60GHz indoor office propagation.Compared with the classic random walk model,the movement tendency in the walking process is taken into account in the modified model.Based on the proposed model,path gains of the propagation environment are simulated under a variety of settings by using a ray tracing method.Simulation results and analysis show that human motion is a major source of disturbance to the indoor office propagation and results in performance degradation in some areas.
