共查询到18条相似文献，搜索用时 429 毫秒
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传统的Camshift运动目标跟踪算法在目标遮挡或背景颜色干扰下,容易陷入局部最大值,造成目标跟踪丢失。针对这一问题,提出了一种结合Kalman滤波及Surf特征提取的改进算法。该算法需在视频序列中手动框选跟踪目标作为目标模板。将传统Camshift算法得到的目标候选区域与目标模板进行直方图对比,得到的巴氏系数若大于设定的阈值则说明目标跟踪丢失。采用Surf算法,在该帧图像中匹配出新的目标候选区域,最终得到候选区域的位置信息更新Kalman滤波。仿真实验表明,改进后的算法在复杂背景下仍然具有良好的跟踪效果。 相似文献
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分析目前运动目标检测跟踪中的经典方法,包括帧间差分法、背景差分法和Mean Shift法,探讨其适用范围及优缺点,然后对3种算法进行验证,给出实验结果,并分析其优缺点。 相似文献
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改进帧差法和背景差法的多目标跟踪 总被引：1，自引：0，他引：1
提出一种将改进的帧差法和改进高斯背景差法相结合来更好地分割出运动目标的算法,其中改进的帧差法是用连续3帧相互帧差之和可有效克服空洞效果;改进高斯背景差法是对像素点的邻域均值替代单个像素点建立高斯背景图像,这样可对光线变化有一定抗干扰能力。将二者结合起来,可较好地跟踪多个运动目标。 相似文献
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本文采用了一种运动目标存在情况下的背景重建算法,能较好地抑制外界环境变化带来的影响。该运动目标检测算法通过一定数量帧的学习、统计,找到各坐标点像素灰度等级的分割阈值。在对当前帧图像进行背景差分后,分割出运动目标区域。若存在运动目标,则根据串行边界跟踪算法获得运动目标轮廓。获得边界后,模型将绘制方框显示运动物体,并发出警报。该运动目标检测模型用VisualC＋＋给予实现。 相似文献
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《洛阳师范学院学报》2015,(8):35-38
本文阐述了在视频场景中进行运动物体检测的基本流程.介绍了视频目标跟踪的基本算法及其研究进展,包括基于帧差的方法、基于背景模型的方法、基于光流的方法、基于上下文的方法,文章分析了它们的优缺点. 相似文献
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《嘉应学院学报》2017,(8):37-40
鉴于传统的帧差法检测准确率不高,而且在光照变化、噪声干扰时鲁棒性不高,容易造成检测错误等问题,提出了一种改进的视频序列运动目标检测算法.该算法是将混合高斯模型与改进的五帧差分算法相结合:首先改进五帧差分是将当前帧与前2帧、后2帧进行差分二值运算,然后将4个差分的结果轮廓填充,最后进行先"与"再"或"运算;通过将混合高斯建模后得到的运动目标与改进的五帧差分算法得到的运动目标,进行逻辑"与"操作,最后再通过形态学处理检测出运动目标.从实验结果证明,改进的算法既能适应光照的变化,又能有效克服空洞的现象,与同类的算法相比具有更高的鲁棒性和准确率. 相似文献
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实时背景更新是数字视频监控中进行运动目标检测的关键技术,与基于PC的监控系统不同,嵌入式系统资源有限,难以执行复杂算法。为此提出一种帧间差分和背景减除法相结合的新方法,通过引入备份帧,有效实现了监控系统的自适应背景更新,并在嵌入式处理器DM6437上实现。实验结果表明该方法可以自动检测物体进出所引起的背景变化并进行背景更新,更新速度快,能够满足实时监控系统目标检测的需要。 相似文献
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Detecting objects of interest from a video sequence is a fundamental and critical task in automated visual surveillance. Most current approaches only focus on discriminating moving objects by background subtraction whether or not the objects of interest can be moving or stationary. In this paper, we propose layers segmentation to detect both moving and stationary target objects from surveillance video. We extend the Maximum Entropy (ME) statistical model to segment layers with features, which are collected by constructing a codebook with a set of codewords for each pixel. We also indicate how the training models are used for the discrimination of target objects in surveillance video. Our experimental results are presented in terms of the success rate and the segmenting precision. 相似文献
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介绍了一种简单、快速的实时交通图像序列中多目标的跟踪算法,在使用自适应背景差分法分割出运动目标候选区域的基础上,通过形态学操作和降低分辨率的方法,得到连通的目标区域,再使用轨迹关联法实现对多目标的跟踪．实验结果表明该算法较好地解决了跟踪的连续性、实时性、精确度的矛盾,同时满足智能交通监控系统的要求． 相似文献
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For the realtime classification of moving vehicles in the multi-lane traffic video sequences, a length-based method is proposed. To extract the moving regions of interest, the difference image between the updated background and current frame is obtained by using background subtraction, and then an edge-based shadow removal algorithm is implemented. Moreover, a thresholding segmentation method for the region detection of moving vehicle based on location search is developed. At the estimation stage, a registration line is set up in the detection area, then the vehicle length is estimated with the horizontal projection technique as soon as the vehicle leaves the registration line. Lastly, the vehicle is classified according to its length and the classification threshold. The proposed method is different from traditional methods that require complex camera calibrations. It calculates the pixel-based vehicle length by using uncalibrated traffic video sequences at lower computational cost. Furthermore, only one registration line is set up, which has high flexibility. Experimental results of three traffic video sequences show that the classification accuracies for the large and small vehicles are 97.1% and 96.7% respectively, which demonstrates the effectiveness of the proposed method. 相似文献
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1IntroductionBackground subtraction methods are extensively ex-ploited for moving object detection in videos in manyapplications ,such as traffic monitoring[1],human mo-tion capture[2]and video surveillance[3]. The centralidea behind such methods is to segment foreground ini mage sequences taken from a fixed camera by com-paring each newframe to a model of the scene back-ground . Therefore , correctly and efficiently modelingand updating the background model is one of the mostchallenging aspec… 相似文献
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在分析复杂天空背景下红外视频序列特征的基础上,针对红外小目标本身特性及红外序列低信噪比的问题,提出适合该环境的红外小目标检测算法.该滤波方法以形态学滤波理论为基础,首先采用均值滤波和Open ing-Tophat运算对红外视频序列进行预处理,然后运用基于均值和方差的统计分割方法提取图像中的运动目标,从而实现了红外小目标的检测.实验结果表明,所提出滤波方法具有良好的检测和分割效果,能够有效地改善跟踪精度. 相似文献
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由于光照变化、物体遮挡和复杂背景条件等众多因素的影响,目标检测一直是机器视觉领域最具有挑战性的问题。首先对视频目标检测算法中的孪生网络系列算法进行分析比较;然后将孪生网络与深度学习相结合,提出并构建全新的孪生网络跟踪器;最后将视频输入到设计好的孪生网络跟踪器中,通过网络对每一帧图像中物体的类别与位置进行准确地实时框选标注。分别将该算法和当前广泛应用的YOLOv3算法在OTB数据集上进行验证测试。测试数据表明:该算法的视频目标检测成功率和准确率均优于YOLOv3算法。 相似文献
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SHILi ZHANGZhao－yang 《上海大学学报(英文版)》2001,5(1):53-56
This paper presents a new approach to the extraction of a moving object from video sequence.The method is based on morphological motion filter using connected operator and a propsed new filtering criterion.The morphological motion filter aims to detect motion which is distinct from that of the background,and thereby locates independently moving physical objects in the secnes.Experiments show that the algorithm can extract object from moving backgrounds efficiently. 相似文献