他们目测估计距离。
你也可以目测进度条的前进速度，大概估计出还需要多久才能全部搞定。
You can also gauge how fast the bar is filling up, so can roughly estimate how long it's going to take for the whole thing to finish.
该算法利用双目测距及基于点对应的运动参数估计原理，求取探测器的姿态和位置信息。
Present a binocular vision-based motion estimation algorithm, this algorithm using binocular measurement method and points-corresponding motion estimation, is an estimate of explorer motion.
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