Optical flow from 1-D correlation: Application to a simple time-to-crash detector
Optical flow from 1-D correlation: Application to a simple time-to-crash detector
复制标题
一维相关的光流：在简单的碰撞时间检测器中的应用
DOI：
10.1007/bf01418979
复制
发表时间：
1993
影响因子：
19.5
通讯作者：
T. Poggio
中科院分区：
文献类型：
--
作者：
N. Ancona;T. Poggio
在本文的第一部分中，我们展示了一种利用连续帧之间的二维甚至一维补丁的一维相关性的新技术可能足以计算出令人满意的光流场估计。该算法非常适合 VLSI 实现。该技术提供的稀疏测量可用于计算许多不同视觉任务的流的定性属性。特别是，本文的第二部分展示了如何将我们的一维相关技术与检测扩展或旋转的方案（Poggio et al. 1991）结合起来，以一个简单的算法，这也提出了有趣的生物学意义。该算法提供了崩溃时间的粗略估计。它在真实图像序列上进行了测试。我们展示其性能并将结果与以前的方法进行比较。
In the first part of this article we show that a new technique exploiting 1-D correlation of 2-D or even 1-D patches between successive frames may be sufficient to compute a satisfactory estimation of the optical flow field. The algorithm is well suited to VLSI implementations. The sparse measurements provided by the technique can be used to compute qualitative properties of the flow for a number of different visual tasks. In particular, the second part of the article shows how to combine our 1-D correlation technique with a scheme for detecting expansion or rotation (Poggio et al. 1991) in a simple algorithm which also suggests interesting biological implications. The algorithm provides a rough estimate of time-to-crash. It was tested on real-image sequences. We show its performance and compare the results to previous approaches.