因此，如何进行有效的视频语义标注是本文研究的目的。
So, how to do video annotation efficiently is the purpose of this paper.
本文讨论了利用半监督学习方法进行视频语义标注的问题。
In this paper, we discuss the problem of using semi-supervised learning method to do video semantic annotation.
目前已有的视频语义标注方法多是基于统计学理论，采用全监督学习方法进行语义标注工作。
At present, most of video semantic annotation methods are based on statistic theory. The methods use supervised learning method to do semantic label.
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