多特征融合的Camshift运动目标跟踪算法

Camshift Tracking Moving Target Algorithm Based on Multi-feature Fusion

传统的Camshift算法以颜色直方图为特征对目标进行跟踪,对刚性目标的跟踪具有较强的鲁棒性。当目标受到颜色相近的干扰物干扰或者部分遮挡时,其跟踪效果和准确度不太理想。为此,提出一种多特征融合的Camshift目标跟踪算法。首先,对目标的颜色特征、边缘特征和空间信息进行提取和处理,得到颜色空间直方图和空间边缘方向直方图;然后,分别在Camshift算法框架下得到目标匹配中心位置,采用每一帧图像的相似度向量得到权值系数,通过自适应加权融合的方法得到最优中心位置。实验结果表明,相较于传统的Camshift目标跟踪算法和改进的复杂特征融合的Meanshift算法,所提方法能够更有效地克服颜色干扰、目标重叠遮挡对跟踪效果的影响,避免了目标在跟踪过程中丢失的问题,突破了传统方法的局限性。

Traditional Camshift algorithm tracks target characterized by the color histogram,with strong robustness for rigid target tracking.However,the tracking effects and accuracy may not be ideal when they are interfered by the objects with similar color.In view of this,a Camshift tracking algorithm of multi-feature fusion was proposed.Firstly,by extracting and processing the color feature,edge feature as well as the spatial information of target,the color space histogram and spatial edge orientation histogram are obtained.Then the central locations of target matching are obtained respectively under the framework of Camshift algorithm and the weight coefficient is obtained by using the similarity vectors of each image.The optimal central location is obtained through the method of adaptive weighted fusion.The experimental results show that compared with the traditional Camshift target tracking and the improved Meanshift algorithm based on complex feature fusion,the proposed method can effectively overcome the problems of color interference and overlapping occlusion that hamper tracking effects.It can avoid the target loss in the process of tracking which breaks through the limitations of traditional methods.