随着高分辨率卫星遥感成像技术的不断发展,可见光遥感图像舰船目标检测成为热门课题,其在军舰探测、精确制导等军用领域以及海面搜救、渔船监测等民用领域具有极其重要的战略意义。针对遥感图像中的舰船检测易受云雾、波浪、岛屿等因素...随着高分辨率卫星遥感成像技术的不断发展,可见光遥感图像舰船目标检测成为热门课题,其在军舰探测、精确制导等军用领域以及海面搜救、渔船监测等民用领域具有极其重要的战略意义。针对遥感图像中的舰船检测易受云雾、波浪、岛屿等因素干扰导致虚警率高的问题,提出了基于舰船方向梯度直方图(Ship Histagram of Oriented Gradient,S-HOG)特征的舰船鉴别算法。首先利用异常点检测提取目标候选区域得到可疑目标切片,然后统计其S-HOG特征剔除虚警,从而有效提取真正的舰船目标。实验结果表明,所提算法能在保证高检测率的同时显著降低虚警率,抗干扰能力强,鲁棒性高。展开更多
传统居家养老模式中,对独居老人的日常生活健康状况的监测及室内活动的异常行为检测,依赖于各种可穿戴传感器设备,易给老人造成行动不便和隐私问题。为此,提出一种基于位置信息的老人异常状态检测方法。该方法根据蓝牙信号的信号强度指...传统居家养老模式中,对独居老人的日常生活健康状况的监测及室内活动的异常行为检测,依赖于各种可穿戴传感器设备,易给老人造成行动不便和隐私问题。为此,提出一种基于位置信息的老人异常状态检测方法。该方法根据蓝牙信号的信号强度指示(Received Signal Strength Indication,RSSI)测距定位,获得老人当前位置,由交互式多模型的卡尔曼滤波方法实现老人在室内的移动轨迹跟踪;对老人在室内移动轨迹进行生理监测,而对老人突发异常状态,通过设置不同室内空间区域的时间阈值,以停留点检测方式进行判断。实验结果表明,该方法简单易于实现,且对于独居老人的日常监护方法优于传统可穿戴传感器设备。展开更多
Abnormal driving behavior identification( ADBI) has become a research hotspot because of its significance in driver assistance systems. However,current methods still have some limitations in terms of accuracy and reli...Abnormal driving behavior identification( ADBI) has become a research hotspot because of its significance in driver assistance systems. However,current methods still have some limitations in terms of accuracy and reliability under severe traffic scenes. This paper proposes a new ADBI method based on direction and position offsets,where a two-factor identification strategy is proposed to improve the accuracy and reliability of ADBI. Self-adaptive edge detection based on Sobel operator is used to extract edge information of lanes. In order to enhance the efficiency and reliability of lane detection,an improved lane detection algorithm is proposed,where a Hough transform based on local search scope is employed to quickly detect the lane,and a validation scheme based on priori information is proposed to further verify the detected lane. Experimental results under various complex road conditions demonstrate the validity of the proposed ADBI.展开更多
文摘随着高分辨率卫星遥感成像技术的不断发展,可见光遥感图像舰船目标检测成为热门课题,其在军舰探测、精确制导等军用领域以及海面搜救、渔船监测等民用领域具有极其重要的战略意义。针对遥感图像中的舰船检测易受云雾、波浪、岛屿等因素干扰导致虚警率高的问题,提出了基于舰船方向梯度直方图(Ship Histagram of Oriented Gradient,S-HOG)特征的舰船鉴别算法。首先利用异常点检测提取目标候选区域得到可疑目标切片,然后统计其S-HOG特征剔除虚警,从而有效提取真正的舰船目标。实验结果表明,所提算法能在保证高检测率的同时显著降低虚警率,抗干扰能力强,鲁棒性高。
文摘传统居家养老模式中,对独居老人的日常生活健康状况的监测及室内活动的异常行为检测,依赖于各种可穿戴传感器设备,易给老人造成行动不便和隐私问题。为此,提出一种基于位置信息的老人异常状态检测方法。该方法根据蓝牙信号的信号强度指示(Received Signal Strength Indication,RSSI)测距定位,获得老人当前位置,由交互式多模型的卡尔曼滤波方法实现老人在室内的移动轨迹跟踪;对老人在室内移动轨迹进行生理监测,而对老人突发异常状态,通过设置不同室内空间区域的时间阈值,以停留点检测方式进行判断。实验结果表明,该方法简单易于实现,且对于独居老人的日常监护方法优于传统可穿戴传感器设备。
基金Supported by the National Natural Science Foundation of China(No.61304205,61502240)Natural Science Foundation of Jiangsu Province(BK20141002)+1 种基金Innovation and Entrepreneurship Training Project of College Students(No.201710300051,201710300050)Foundation for Excellent Undergraduate Dissertation(Design) of Naning University of Information Science & Technology
文摘Abnormal driving behavior identification( ADBI) has become a research hotspot because of its significance in driver assistance systems. However,current methods still have some limitations in terms of accuracy and reliability under severe traffic scenes. This paper proposes a new ADBI method based on direction and position offsets,where a two-factor identification strategy is proposed to improve the accuracy and reliability of ADBI. Self-adaptive edge detection based on Sobel operator is used to extract edge information of lanes. In order to enhance the efficiency and reliability of lane detection,an improved lane detection algorithm is proposed,where a Hough transform based on local search scope is employed to quickly detect the lane,and a validation scheme based on priori information is proposed to further verify the detected lane. Experimental results under various complex road conditions demonstrate the validity of the proposed ADBI.
