共查询到19条相似文献,搜索用时 125 毫秒
1.
超宽带雷达用于人体探测,在大规模城区巷战、反恐斗争和灾害救援等方面有着广阔的应用前景.传统的超宽带成像算法在识别能力及计算效率上已不能满足要求.本文针对运动人体目标场景建立系统模型,将人体运动等效为天线移动扫描,基于快速SEABED成像算法提出一种用于超宽带雷达的动目标跟踪成像算法.仿真与实验结果验证了算法的有效性和可行性,该算法对系统硬件要求低,实时性好,准确度高,能完成对运动目标速度估计及运动轨迹跟踪,并对目标边界成像. 相似文献
2.
3.
《现代电子技术》2017,(19):86-90
为了解决传统基于卡尔曼滤波算法进行艺术体操轨迹跟踪时存在的跟踪漂移以及跟踪效率低等问题,研究基于计算机视觉的艺术体操轨迹跟踪方法,通过Vi Be运动目标检索算法对图像的颜色以及深度信息建模,基于图像颜色以及深度的波动检测出视频中的运动目标,采用KCF算法实现运动目标的初步跟踪,在该方法的基础上,通过改进KCF算法解决运动目标被遮挡出现的跟踪漂移问题,提高运动目标跟踪的精度和稳定性。通过Hermite插值运算运动目标质心,基于时刻t的运动模糊方向获取瞬时质心轨迹,得到最佳的运动目标质心轨迹,采用曲线拟合措施获取精确的运动目标质心轨迹。实验结果说明,所提方法可准确跟踪艺术体操运动轨迹,具有较高的跟踪效率和稳定性。 相似文献
4.
红外搜索跟踪系统得到的数据存在较多虚警和杂波,所以宜采用多假设跟踪(MHT)算法对多个运动目标进行跟踪.针对MHT算法计算量大的缺点,对算法做出了改进和简化,仿真结果表明了改进后的算法在降低计算量的同时能够有效地摒弃虚警、跟踪多个目标. 相似文献
5.
在目标跟踪过程中,目标在图像中的形状和大小常发生不同程度的变化,为了准确、有效地实现目标跟踪,采用多次迭代的连续自适应平均值移动算法。该算法是一种基于颜色跟踪的算法,根据多次迭代的计算结果,自适应调整图像序列中搜索窗口的大小和位置,从而得到当前图像中的目标中心,实现对运动目标的跟踪。最后分别在不同变形情况下和多个运动目标下进行实验。实验结果表明,当目标发生旋转、大小变化及存在多个目标的情况下,该算法仍能有效地对运动目标进行准确跟踪。 相似文献
6.
结合目标预估计与Mean Shift理论的运动目标跟踪算法 总被引:3,自引:0,他引:3
图像的运动包括目标、背景和平台的运动,复杂的运动关系增加了目标跟踪的难度.提出了一种有效的基于Mean Shift理论的运动目标跟踪算法.为提高算法的实时性,对Mean Shift算法的核函数进行了改进,使得加减运算替代乘方和浮点运算,大大提高了运算效率;并通过对迭代权值的改进,强化了初始模板的主要信息,提高了算法跟踪与背景相似目标的能力;采用自动更新模板的策略,克服了目标特征分布发生改变的问题;在此基础上,引入了目标预检测,提出了综合背景差分检测的运动目标跟踪算法,实验表明:该算法在目标被遮挡情况下具有较强的适应性. 相似文献
7.
8.
9.
将梯度信息引入到Camshift算法之中,定义Camshift算法的梯度模型。依据运动目标和背景图像直方图的Bhattacharyya距离来动态决定梯度模型在查找算法中的决定权重,减小加入梯度后对算法时效性的影响;在Camshift算法求运动目标色调分量的过程中,改进由RGB空间到HSV空间转换计算的方法,减少反余弦和开方运算。在色调分量Hue基础上定义一种Hue分量,提高颜色空间之间的转换效率;在对目标跟踪框内颜色直方图进行计算时,以选取框重心位置为中心,距离中心越远的像素在颜色直方图中的比重越小.减小在选取运动物体初始位置时引入的背景噪声,提高跟踪算法的稳定性。实验证明:经过上述的改进,使得传统的Camshift算法在背景颜色与运动目标和有相似颜色物体对运动目标造成干扰的情况下的跟踪鲁棒性得到提高。 相似文献
10.
11.
12.
基于视频序列的运动目标追踪算法 总被引:1,自引:0,他引:1
介绍了一种对视频序列中运动目标追踪的实现算法,该算法在运动目标检测的基础上,融合了卡尔曼滤波和Meanshift算法实现对快速移动目标的追踪。卡尔曼滤波对下一帧目标可能出现的位置做出估计,Meanshift迭代算子在估计出的区域对目标精确定位。经实际验证其有效地克服了传统Meanshift算法对于快速移动物体追踪可能出现的丢失目标的问题,目标追踪效果明显提高。 相似文献
13.
14.
Video object tracking using adaptive Kalman filter 总被引:1,自引:0,他引:1
Shiuh-Ku Chung-Ming Shu-Kang 《Journal of Visual Communication and Image Representation》2006,17(6):1190-1208
In this paper, a new video moving object tracking method is proposed. In initialization, a moving object selected by the user is segmented and the dominant color is extracted from the segmented target. In tracking step, a motion model is constructed to set the system model of adaptive Kalman filter firstly. Then, the dominant color of the moving object in HSI color space will be used as feature to detect the moving object in the consecutive video frames. The detected result is fed back as the measurement of adaptive Kalman filter and the estimate parameters of adaptive Kalman filter are adjusted by occlusion ratio adaptively. The proposed method has the robust ability to track the moving object in the consecutive frames under some kinds of real-world complex situations such as the moving object disappearing totally or partially due to occlusion by other ones, fast moving object, changing lighting, changing the direction and orientation of the moving object, and changing the velocity of moving object suddenly. The proposed method is an efficient video object tracking algorithm. 相似文献
15.
16.
Object detection and tracking is a fundamental, challenging task in computer vision because of the difficulties in tracking. Continuous deformation of objects during movement and background clutter leads to poor tracking. In this paper, a method of multiple moving object detection and tracking by combining background subtraction and K-means clustering is proposed. The proposed method can handle objects occlusion, shadows and camera jitter. Background subtraction filters irrelevant information, and K-means clustering is employed to select the moving object from the remaining information, and it is capable of handling merging and splitting of moving objects using spatial information. Experimental results show that the proposed method is robust when compared to other techniques. 相似文献
17.
18.
19.
This paper presents an effective method for the detection and tracking of multiple moving objects from a video sequence captured by a moving camera without additional sensors. Moving object detection is relatively difficult for video captured by a moving camera, since camera motion and object motion are mixed. In the proposed method, the feature points in the frames are found and then classified as belonging to foreground or background features. Next, moving object regions are obtained using an integration scheme based on foreground feature points and foreground regions, which are obtained using an image difference scheme. Then, a compensation scheme based on the motion history of the continuous motion contours obtained from three consecutive frames is applied to increase the regions of moving objects. Moving objects are detected using a refinement scheme and a minimum bounding box. Finally, moving object tracking is achieved using a Kalman filter based on the center of gravity of a moving object region in the minimum bounding box. Experimental results show that the proposed method has good performance. 相似文献