Videotrees: Improving video surrogate presentation using hierarchy

Jansen, Michel; Heeren, Willemijn; Dijk, Betsy van

doi:10.1109/cbmi.2008.4564997

Cited by 13 publications

(11 citation statements)

References 21 publications

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“…In addition, it could be beneficial to investigate alternative content visualization methods that allow users to see more content at a glance and hence to more quickly recognize desired content (like for example [2]). Also, the usage of visualizations that more clearly convey information about the content structure (e.g., [5,15,28]) could be very helpful.…”

Section: Discussionmentioning

confidence: 99%

The Video Browser Showdown: a live evaluation of interactive video search tools

Schoeffmann

Ahlström

Bailer

et al. 2013

Int J Multimed Info Retr

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The Video Browser Showdown evaluates the performance of exploratory video search tools on a common data set in a common environment and in presence of the audience. The main goal of this competition is to enable researchers in the field of interactive video search to directly compare their tools at work. In this paper we present results from the second Video Browser Showdown (VBS2013) and describe and evaluate the tools of all participating teams in detail. The evaluation results give insights on how exploratory video search tools are used and how they perform in direct compari- son. Moreover, we compare the achieved performance to results from another user study where 16 participants employed a standard video player to complete the same tasks as performed in VBS2013. This comparison shows that the sophisticated tools enable better performance in general but for some tasks common video players provide similar performance and could even outperform the expert tools. Our results highlight the need for further improvement of professional tools for interactive search in videos.

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Section: Discussionmentioning

confidence: 99%

The Video Browser Showdown: a live evaluation of interactive video search tools

Schoeffmann

Ahlström

Bailer

et al. 2013

Int J Multimed Info Retr

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“…To provide an overview of the entire clip at a glance and support rapid navigation, recent research has used a grid layout to display pre-cached thumbnails [27], short snippets [18] in a single clip, personal watching history for multiple clips [1], a conceptual hierarchy visualization [19], or a 3D space-time cube display [31]. For educational lecture videos, Panopticon [18] has been shown to shorten task completion time in seeking information inside videos [32].…”

Section: Video Navigation Techniquesmentioning

confidence: 99%

Data-driven interaction techniques for improving navigation of educational videos

Kim

Guo

Cai

et al. 2014

Proceedings of the 27th Annual ACM Symposium on User Interface Software and Technology

140

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With an unprecedented scale of learners watching educational videos on online platforms such as MOOCs and YouTube, there is an opportunity to incorporate data generated from their interactions into the design of novel video interaction techniques. Interaction data has the potential to help not only instructors to improve their videos, but also to enrich the learning experience of educational video watchers. This paper explores the design space of data-driven interaction techniques for educational video navigation. We introduce a set of techniques that augment existing video interface widgets, including: a 2D video timeline with an embedded visualization of collective navigation traces; dynamic and non-linear timeline scrubbing; data-enhanced transcript search and keyword summary; automatic display of relevant still frames next to the video; and a visual summary representing points with high learner activity. To evaluate the feasibility of the techniques, we ran a laboratory user study with simulated learning tasks. Participants rated watching lecture videos with interaction data to be efficient and useful in completing the tasks. However, no significant differences were found in task performance, suggesting that interaction data may not always align with moment-by-moment information needs during the tasks.

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“…Pace proportional uses variable playback rate based on the frame-level tempo and interesting shots discard shots with low tempo values according to the selected compression rate. Jansen et al [14] proposed VideoTrees, as alternatives to storyboards, for the purpose of video browsing. A VideoTree is a hierarchical tree-like temporal presentation of a video through keyframes.…”

Section: Related Workmentioning

confidence: 99%

Video Browsing Using Interactive Navigation Summaries

Schoeffmann

Boeszoermenyi

2009

2009 Seventh International Workshop on Content-Based Multimedia Indexing

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A new approach for interactive video browsing is described. The novelty of the proposed approach is the flexible concept of interactive navigation summaries. Similar to time sliders, commonly used with standard soft video players, navigation summaries allow random access to a video. In addition, they also provide abstract visualizations of the content at a user-defined level of detail and, thus, quickly communicate content characteristics to the user. Navigation summaries can provide visual information about both low-level features but even high-level features. The concept fully integrates the user, who knows best which navigation summary at which level of detail could be most beneficial for his/her current video browsing task, and provide him/her a flexible set of navigation means. A first user study has shown that our approach can significantly outperform standard soft video players -the state-of-the art "poor man's" video browsing tool.

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Videotrees: Improving video surrogate presentation using hierarchy

Cited by 13 publications

References 21 publications

The Video Browser Showdown: a live evaluation of interactive video search tools

The Video Browser Showdown: a live evaluation of interactive video search tools

Data-driven interaction techniques for improving navigation of educational videos

Video Browsing Using Interactive Navigation Summaries

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