首先利用运动估计预测目标在下一帧的感兴趣区域，也就是跟踪窗。
The regions of interest which contain the target in the next frame, namely tracking windows, are predicted by motion estimator.
它采用类似差分的方法从图像序列的多帧图像中检测出运动目标区域。
Motion object region is extracted from multi-frame images in image sequences by using similar difference method.
他们需要策划回到扫运动目标区域用哈伯太空望远镜两年后第一次进行了比较研究。
Plotting their motion required returning to the SWEEPS target region with Hubble two years after the first observations were made.
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