DETERMINING OPTICAL-FLOW
DETERMINING OPTICAL-FLOW
复制标题
DOI：
10.1016/0004-3702(81)90024-2
复制
发表时间：
1981-01-01
影响因子：
14.4
通讯作者：
SCHUNCK, BG
中科院分区：
文献类型：
--
作者：
HORN, BKP;SCHUNCK, BG
光流不能局部计算，因为在一个点处从图像序列中仅可获得一个独立测量，而流速具有两个分量。还需要第二个约束。本文提出了一种求光流场的方法，该方法假定亮度场的视速度在图象中几乎处处平滑地变化。示出了一种迭代实现，其成功地计算了一些合成图像序列的光流。该算法是鲁棒的，因为它可以处理图像序列，而在空间和时间上粗略量化。它对亮度水平和加性噪声的量化也不敏感。例子包括在奇异点或沿着线在图像中的平滑的假设被违反。
Optical flow cannot be computed locally, since only one independent measurement is available from the image sequence at a point, while the flow velocity has two components. A second constraint is needed. A method for finding the optical flow pattern is presented which assumes that the apparent velocity of the brightness pattern varies smoothly almost everywhere in the image. An iterative implementation is shown which successfully computes the optical flow for a number of synthetic image sequences. The algorithm is robust in that it can handle image sequences that are quantized rather coarsely in space and time. It is also insensitive to quantization of brightness levels and additive noise. Examples are included where the assumption of smoothness is violated at singular points or along lines in the image.