共查询到20条相似文献,搜索用时 46 毫秒
1.
胡祥卫 《自动化与仪器仪表》2020,(9):44-47
针对原有复杂道路下车辆轨迹跟踪定位方法对于车辆的跟踪定位精度较差的问题,设计复杂道路下车辆轨迹智能跟踪定位方法.采用栅格法完成道路环境模型的构建,以此控制车辆行驶中的环境因素.引用预瞄型的轨迹跟踪控制器获取预瞄曲线的临界值控制车辆的轨迹,采用车辆速度控制算法提升对车辆速度的控制能力,得到车辆横向驱动模型.将上述部分相结... 相似文献
2.
3.
为了解决传统目标跟踪算法在有遮挡后无法准确跟踪的问题,提出了将YOLO和Camshift算法相联合的目标跟踪算法.基于YOLO网络结构来构建目标检测的模型,在模型构建之前,采用图像增强的方法对视频帧进行预处理,在保留视频帧中足够图像信息的同时,提高图像质量,降低YOLO算法的时间复杂度.用YOLO算法确定出目标,完成对目标跟踪的初始化.根据目标的位置信息使用Camshift算法对后续的视频帧进行处理,并对每一帧的目标进行更新,从而可以保证不断调整跟踪窗口位置,适应目标的移动.实验结果表明,所提的方法能够有效地克服目标被遮挡后跟踪丢失的问题,具有很好的鲁棒性. 相似文献
4.
5.
6.
基于Camshift与Kalman的目标跟踪算法 总被引:1,自引:0,他引:1
针对目标跟踪复杂的难点,提出了一种比较实用的跟踪方法。采用基于颜色概率分布的Camshift算法进行目标跟踪的同时,引入卡尔曼滤波,并给出模型参数。在目标发生遮挡时,使用卡尔曼滤波对目标运动状态进行估计。实验表明,算法能够对目标进行持续、稳定的跟踪。 相似文献
7.
8.
9.
团块与Mean-Shift结合的局部遮挡目标跟踪 总被引:2,自引:0,他引:2
传统的基于Mean-Shift的目标跟踪方法利用目标的全局特征进行跟踪,在局部遮挡情况下跟踪效果不佳。提出一种基于团块建模和Mean-Shift相结合的利用目标局部特征的运动目标跟踪方法,对目标进行团块建模,利用Mean-shift算法对各团块进行跟踪,在此基础上确定目标新位置。该方法能够在目标发生局部遮挡时,自动选取未被遮挡的团块的跟踪结果来确定目标的位置。为了提高方法对背景干扰的鲁棒性,采用背景加权的Mean-Shift算法。实验结果表明:该方法在局部遮挡的情况下可较好地进行目标跟踪,跟踪效果优于报导的基于Mean-Shift的方法。 相似文献
10.
11.
12.
13.
《Displays》2023
Multi-target tracking is one of the important fields in computer vision, which aims to solve the problem of matching and correlating targets between adjacent frames. In this paper, we propose a fine-grained track recoverable (FGTR) matching strategy and a heuristic empirical learning (HEL) algorithm. The FGTR matching strategy divides the detected targets into two different sets according to the distance between them, and adopts different matching strategies respectively, in order to reduce false matching, we evaluated the trust degree of the target’s appearance feature information and location feature information, adjusted the proportion of the two reasonably, and improved the accuracy of target matching. In order to solve the problem of trajectory drift caused by the cumulative increase of Kalman filter error during the occlusion process, the HEL algorithm predicts the position information of the target in the next few frames based on the effective information of other previous target trajectories and the motion characteristics of related targets. Make the predicted trajectory closer to the real trajectory. Our proposed method is tested on MOT16 and MOT17, and the experimental results verify the effectiveness of each module, which can effectively solve the occlusion problem and make the tracking more accurate and stable. 相似文献
14.
Probabilistic people tracking with appearance models and occlusion classification: The AD-HOC system
AD-HOC (Appearance Driven Human tracking with Occlusion Classification) is a complete framework for multiple people tracking in video surveillance applications in presence of large occlusions. The appearance-based approach allows the estimation of the pixel-wise shape of each tracked person even during the occlusion. This peculiarity can be very useful for higher level processes, such as action recognition or event detection. A first step predicts the position of all the objects in the new frame while a MAP framework provides a solution for best placement. A second step associates each candidate foreground pixel to an object according to mutual object position and color similarity. A novel definition of non-visible regions accounts for the parts of the objects that are not detected in the current frame, classifying them as dynamic, scene or apparent occlusions. Results on surveillance videos are reported, using in-house produced videos and the PETS2006 test set. 相似文献
15.
For many vision-based systems, it is important to detect a moving object automatically. The region-based motion estimation method is popular for automatic moving object detection. The region-based method has several advantages in that it is robust to noise and variations in illumination. However, there is a critical problem in that there exists an occlusion problem which is caused by the movement of the object. The occlusion problem results in an incorrect motion estimation and faulty detection of moving objects. When there are occlusion regions, the motion vector is not correctly estimated. That is, a stationary background in the occluded region can be classified as a moving object.In order to overcome this occlusion problem, a new occlusion detection algorithm is proposed. The proposed occlusion detection algorithm is motivated by the assumption that the distribution of the error histogram of the occlusion region is different from that of the nonocclusion region. The proposed algorithm uses the mean and variance values to decide whether an occlusion has occurred in the region. Therefore, the proposed occlusion detection and motion estimation scheme detects the moving regions and estimates the new motion vector, while avoiding misdetection caused by the occlusion problem. The experimental results for several video sequences demonstrate the robustness of the proposed approach to the occlusion problem.This work was presented in part at the 8th International Symposium on Artificial Life and Robotics, Oita, Japan, January 24–26, 2003 相似文献
16.
17.
针对Mean Shift算法难以跟踪快速运动目标、算法迭代次数多以及耗费时间长的问题,提出了一种基于Mean Shift的快速运动目标检测方法,该方法结合帧差法并融合背景信息来快速检测运动目标;同时提出一种新的相似性度量方法进行初步检测,排除干扰并快速选出符合标准的目标以进行Mean Shift匹配,找出最佳目标。该方法不仅减少了传统方法的迭代次数,缩短了算法所需时间,而且在跟踪实验中取得了较好的跟踪效果,提升了算法的鲁棒性。 相似文献
18.
为了简化融合中心数据处理的复杂度,减轻计算机的负担和通信开销,研究了两传感器两采样周期的数据关联问题。建立了测量到航迹分配的线性规划数学模型,提出了关联测量数据的融合方法,采用带滤波器的遗传算法求解最优分配方案。仿真结果表明,这种数据关联方法所得到的目标航迹比单传感器的目标航迹更加精确。 相似文献
19.
Ahmed M. KhedrAuthor Vitae Walid OsamyAuthor Vitae 《Journal of Parallel and Distributed Computing》2011,71(10):1318-1326
Target tracking is an important sensing application of wireless sensor networks. In these networks, energy, computing power, and communication bandwidth are scarce. We have considered a random heterogeneous wireless sensor network, which has several powerful nodes for data aggregation/relay and large number of energy-constrained sensor nodes that are deployed randomly to cover a given target area. In this paper, a cooperative approach to detect and monitor the path of a moving object using a minimum subset of nodes while maintaining coverage and network connectivity is proposed. It is tested extensively in a simulation environment and compared with other existing methods. The results of our experiments clearly indicate the benefits of our new approach in terms of energy consumption. 相似文献