单目视频运动目标轨迹三维重建的平滑约束法

提出了利用单目视频重建运动目标三维轨迹的平滑约束方法.通过引入平滑约束,得到重建运动目标三维轨迹的无约束最优化模型,进而推导出其闭式最优解.提出的平滑约束是对运动目标三维轨迹的本质约束,更具一般性,可以反映目标运动的连续、渐变与平滑特性,与基于离散余弦变换基和多项式基等预先定义基约束相比具有更强的适应性,同时能够直接应用于部分观测数据缺失的情形.给出了单目视频轨迹重建问题的几何解释,并对轨迹重建问题中的唯一性进行分析.仿真和真实单目视频序列上的实验证明了提出方法的有效性和先进性.

Generic smoothness constrained 3D trajectory reconstruction of moving object from monocular video

In this paper,generic smoothness constrained 3D trajectory reconstruction of moving object from monocular video is proposed.By introducing the generic smoothness constraint on the 3D trajectory,unconstrained optimization model for 3D trajectory reconstruction is achieved and a closed-form solution is derived.Compared with the predefined basis methods such as Discrete Cosine Transform based method and polynomial basis based method,the proposed method is more generic and can be applied to incomplete measurement case,thus having broad applicability.Geometric explanation and uniqueness of 3D trajectory reconstruction are given.Experimental results on both synthetic data and real monocular video sequences have shown the validity and advancement of the proposed method.