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Video Summarization -  ,  

summary create events priority

M. Albanese 1 , C. Cesarano 1 , M.Fayzullin 2 , A. Picariello 1 and V.S. Subrahmanian 2

1 Dipartimento di Informatica e Sistemistica, Università di Napoli “Federico II”, Napoli, Italy
2 Department of Computer Science, University of Maryland, College Park, MD, USA

Definition: Video summarization refers to creating a summary of a digital video, which must satisfy the following three principles: (1) the video summary must contain high priority entities and events from the video, (2) the summary itself should exhibit reasonable degrees of continuity, and (3) the summary should be free of repetition.

The past decade has seen explosive growth in the ability of individuals to create and/or capture digital video, slowly leading to large personal and corporate digital video archives. In the corporate arena, there is a growing need for video summarization. For instance, a company that uses video technology to secure its buildings may wish to summarize the surveillance video so that only important events are included in the summary. An online education courseware seller may want to create brief summaries of educational videos that focus on the most exciting snippets of the course in question. A sports organization such as the National Basketball Association in the USA or the Federation Internationale de Football Association (FIFA) may wish to create summaries consisting of a few game highlights so that these summaries can be shown to potential customers who would subsequently buy the whole video. Military organizations may wish to summarize airborne surveillance video so that high priority events such as missile firings or suspicious vehicle activity can be detected. Large movie databases such as the Internet Movie Database (IMDb) or movie sellers may wish to automatically create movie trailers.

In general, a summary of a video must satisfy the following three principles first enunciated by Fayzullin et al. The video summary must contain high priority entities and events from the video. For example, a summary of a soccer game must show goals, spectacular goal attempts, as well as any other notable events such as the ejection of a player from the game, any fistfights or scuffles and so on. In addition, the summary itself should exhibit reasonable degrees of continuity – the summary must not look like a bunch of video segments blindly concatenated together. A third criterion is that the summary should be free of repetition – this can be difficult to achieve. For example, it is common in soccer videos for the same goal to be replayed several times. It is not that easy to automatically detect that the same event is being shown over and over again. These three tenets, named the CPR (Continuity, Priority and no Repetition) form the basic core of all strong video summarization methods.

The video summarization literature contains two broad classes of methods to summarize video. In the first class, that we call the physical video property based class, physical properties of the video stream are used to create a summary. The second class, that we call the semantic video property class, tries to use semantic information about the content of the video in order to determine which frames of video must be included.

 

 

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