In processing the dynamic images, occlusion detection and tracking of moving targets in an image sequence are very significant and difficult problems.
图像序列中运动目标的遮挡检测和处理是目前在动态图像处理时经常碰到，且比较难于解决的问题。
It is very important to track multi-object in video processing all along. The calculation of observation likelihood is a difficult problem under the circumstance of occlusion by the targets.
多目标追踪一直是视频处理中的重要问题，目标互相遮挡的情况下观测置信度的计算是多目标追踪中的难点。
Because of the occlusion and complicated image processing, the real-time visual tracking, which is the current research focus, is difficult to improve.
由于存在遮挡、图像处理复杂等特点，视觉跟踪的实时性一直难以提高，实时性是目前视觉跟踪技术研究的重点。
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