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Suporn Pongnumkul

 

Publications by Suporn Pongnumkul (bibliography)

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2011
 
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Pongnumkul, Suporn, Dontcheva, Mira, Li, Wilmot, Wang, Jue, Bourdev, Lubomir, Avidan, Shai and Cohen, Michael F. (2011): Pause-and-play: automatically linking screencast video tutorials with applications. In: Proceedings of the 2011 ACM Symposium on User Interface Software and Technology 2011. pp. 135-144. Available online

Video tutorials provide a convenient means for novices to learn new software applications. Unfortunately, staying in sync with a video while trying to use the target application at the same time requires users to repeatedly switch from the application to the video to pause or scrub backwards to replay missed steps. We present Pause-and-Play, a system that helps users work along with existing video tutorials. Pause-and-Play detects important events in the video and links them with corresponding events in the target application as the user tries to replicate the depicted procedure. This linking allows our system to automatically pause and play the video to stay in sync with the user. Pause-and-Play also supports convenient video navigation controls that are accessible from within the target application and allow the user to easily replay portions of the video without switching focus out of the application. Finally, since our system uses computer vision to detect events in existing videos and leverages application scripting APIs to obtain real time usage traces, our approach is largely independent of the specific target application and does not require access or modifications to application source code. We have implemented Pause-and-Play for two target applications, Google SketchUp and Adobe Photoshop, and we report on a user study that shows our system improves the user experience of working with video tutorials.

© All rights reserved Pongnumkul et al. and/or ACM Press

2010
 
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Pongnumkul, Suporn, Wang, Jue, Ramos, Gonzalo and Cohen, Michael (2010): Content-aware dynamic timeline for video browsing. In: Proceedings of the 2010 ACM Symposium on User Interface Software and Technology 2010. pp. 139-142. Available online

When browsing a long video using a traditional timeline slider control, its effectiveness and precision degrade as a video's length grows. When browsing videos with more frames than pixels in the slider, aside from some frames being inaccessible, scrolling actions cause sudden jumps in a video's continuity as well as video frames to flash by too fast for one to assess the content. We propose a content-aware dynamic timeline control that is designed to overcome these limitations. Our timeline control decouples video speed and playback speed, and leverages video content analysis to allow salient shots to be presented at an intelligible speed. Our control also takes advantage of previous work on elastic sliders, which allows us to produce an accurate navigation control.

© All rights reserved Pongnumkul et al. and/or their publisher

2008
 
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Pongnumkul, Suporn, Wang, Jue and Cohen, Michael F. (2008): Creating map-based storyboards for browsing tour videos. In: Cousins, Steve B. and Beaudouin-Lafon, Michel (eds.) Proceedings of the 21st Annual ACM Symposium on User Interface Software and Technology October 19-22, 2008, Monterey, CA, USA. pp. 13-22. Available online

 
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