英语翻译As a practical matter one has a choice of how to interlace the iterations with the time steps.On the one hand,one could iterate until the solution has stabilized before advancing to the next image frame.On the other hand,given a good init

英语翻译As a practical matter one has a choice of how to interlace the iterations with the time steps.On the one hand,one could iterate until the solution has stabilized before advancing to the next image frame.On the other hand,given a good init
英语翻译
As a practical matter one has a choice of how to interlace the iterations with
the time steps.On the one hand,one could iterate until the solution has
stabilized before advancing to the next image frame.On the other hand,given
a good initial guess one may need only one iteration per time-step.A good
initial guess for the optical flow velocities is usually available from the previous
time-step.
The advantages of the latter approach include an ability to deal with more
images per unit time and better estimates of optical flow velocities in certain
regions.Areas in which the brightness gradient is small lead to uncertain,noisy
estimates obtained partly by filling in from the surround.These estimates are
improved by considering further images.The noise in measurements of the
images will be independent and tend to cancel out.Perhaps more importantly,
different parts of the pattern will drift by a given point in the image.The
direction of the brightness gradient will vary with time,providing information
about both components of the optical flow velocity.
A practical implementation would most likely employ one iteration per time
step for these reasons.We illustrate both approaches in the experiments.

英语翻译As a practical matter one has a choice of how to interlace the iterations with the time steps.On the one hand,one could iterate until the solution has stabilized before advancing to the next image frame.On the other hand,given a good init
作为一个实际问题有选择如何交错迭代与
时间步长.另一方面,一个可以迭代直至溶液
稳定后再推进到下一帧图像.另一方面,由于
一个良好的初始猜测,可能只需要一个迭代的时间步长.很好
的光流速度的初始猜测通常是从以前的
时间步长.
后一种方法的优点包括能够处理更多
图像的每单位时间和更好的光流估计在一定
区域.在它的亮度梯度小,导致不确定的领域,噪声
估计部分填写从环绕.这些估计是
通过考虑进一步的图像的改进.在测量的噪声
图像将被独立倾向于取消.也许更重要的是,
该模式的不同部分会在图像中某一点.的
的亮度梯度的方向会随着时间的变化而变化,提供信息
对光流速度这两个组件.
一个实际的实现将最有可能使用每次迭代
由于这些原因,一步.我们说明的实验方法.