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Copy Detection Using Graphical Model: HMM for Frame Fusion
Abstract
With the growing popularity of video sharing websites and editing tools, it is easy for people to involve the video content from different sources into their own work, which raises the copyright problem. Content-based video copy detection attempts to track the usage of the copyright-protected video content by using video analysis techniques, which deals with not only whether a copy occurs in a query video stream but also where the copy is located and where the copy is originated from. While a lot of work has addressed the problem with good performance, less effort has been made to consider the copy detection problem in the case of a continuous query stream, for which precise temporal localization and some complex video transformations like frame insertion and video editing need to be handled. In this chapter, the authors attack the problem by employing the graphical model to facilitate the frame fusion based video copy detection approach. The key idea is to convert frame fusion problem into graph model decoding problem with the temporal consistency constraint and three relaxed constraints. This work employs the HMM model to perform frame fusion and propose a Viterbi-like algorithm to speedup frame fusion process.
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