目标模型内的背景像素会造成目标跟踪定位偏差,但为了将跟踪目标全部包含在目标模型中,不可避免在目标模型内引入很多背景像素。为了减少背景对跟踪造成偏差,在目标模型中引入带权因子,可达到降低目标模型内背景像素对跟踪定位精度的影响。带权因子是这样确定的:通过利用目标外围矩形环中的背景信息和一个映射函数来生产一个新的特征向量,然后转换为带权因子。实验表明,该方法具有更好的跟踪精度,对遮挡具有更好的鲁棒性。
Background pixels in object model will induce localization error of object tracking,but in order to let the object contained in object model,it was inevitable to introduce some background pixels in object model.For reducing the localization error of object tracking,a weight was used in object model.The weight indicate the alike degree between background character and object character and could reduce localization error of object tracking introducing by background pixels in object model.The experimental results show the approach has good localization precision of object tracking,and are robust against occlusion.