A Fast Simple Optical Flow Computation Approach Based on the 3-D Gradient
A Fast Simple Optical Flow Computation Approach Based on the 3-D Gradient
复制标题
一种基于3维梯度的快速简单光流计算方法
DOI：
10.1109/tcsvt.2013.2283648
复制
发表时间：
2014-05-01
影响因子：
8.4
通讯作者：
Zhao, Xiangfu
中科院分区：
文献类型：
--
作者：
Li, Yuanwei;Zhu, En;Zhao, Xiangfu
光流场估计是计算机视觉应用中的一项基本任务。本文提出了一种基于视频序列中三维梯度的光流场计算方法。虽然该算法不提供高度准确的结果，但它计算简单且快速，并且输出适用于许多应用。其基本思想是点在视频序列中会形成轨迹，每个点在两帧之间的轨迹被近似为一条直线，在我们的算法中这条直线是轨迹的切线。因此，每个点的光流是表示其轨迹的直线在像平面中的投影线。实验结果表明，该算法是高效的，有效的，并在角度上是令人满意的精度。它能够为实时应用提供有效的光流结果。
Optical flow estimation is a fundamental task of many computer vision applications. In this paper, we propose a fast simple algorithm to compute optical flow based on the 3-D gradient in video sequences. Although the algorithm does not provide highly accurate results, it is computationally simple and fast, and the output is applicable for many applications. The basic idea is that points will form trajectories in video sequences, and the trajectory between two frames of each point is approximated as a straight line, which is the tangent of the trajectory in our algorithm. Therefore, the optical flow of each point is the projecting line of the straight line, which represents its trajectory, in the image plane. Experimental results show that the proposed algorithm is efficient and effective, and is of satisfying accuracy on angle. It is able to provide effective optical flow results for real-time applications.