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VIDEO BROWSING

VIDEO BROWSING. BY MITA RANA. Papers. Interactive Audio-Visual Video Browsing Advanced User Interfaces for Dynamic Video Browsing Interactive video Browsing on mobile Devices. Interactive Audio-Visual Video Browsing. Methodology. Position Based Browsing

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VIDEO BROWSING

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  1. VIDEO BROWSING BY MITA RANA

  2. Papers • Interactive Audio-Visual Video Browsing • Advanced User Interfaces for Dynamic Video Browsing • Interactive video Browsing on mobile Devices

  3. Interactive Audio-Visual Video Browsing

  4. Methodology • Position Based Browsing - Ability to quickly change between different levels of granularity when navigating a video file. - More suited if navigation on a finer level and exact positioning are required. - It Allows user to directly control the position which is currently displayed.

  5. Methodology • Speed Based Browsing - The mode of choice for skimming larger parts of a file at a constant speed . - It enables users to modify replay speed at various levels. • A good design includes both position based browsing and speed based browsing

  6. Problem • Scaling - The smallest possible move of the slider thumb can result in a large jump in the file. - The result is jerky visual feedback, considered irritating by the users. - In worst case, particular information is skipped completely.

  7. Scaling Problem

  8. Types of Interfaces • Zoom Slider -Solves the scaling Problem - Uses Position Based Browsing Method - It enables user to continuously zoom in and out of a slider’s scale while browsing a video file. - Advantage – Modification of the scale can be done continuously even while skimming through data.

  9. - If users click anywhere on the player window and move to left or right ,they navigate through the file backward or forward along a virtual, horizontally mounted timeline. - If users move the mouse pointer vertically, moving the pointer upwards results in a finer scale, downwards movement cause a zoom-out. - Cont…

  10. Types of Interfaces • Extension of Zoom slider Interface • Integration of speed-based browsing - Speed-based browsing is added to borders of the player window. - If a user reaches right border of the player window, Scrolling part is activated.

  11. Cont>> • Using new zoom slider interface a user can skim the file at different replay speeds using the speed-bar located at the right border of the player window. • Speed can be modified by moving the pointer up or down . • Once a particular part of interest is found, the user can switch to position based navigation by simply moving the pointer to left.

  12. Types of Interfaces • AV Zoom Slider - Both Speed based and Position based navigation method is used. - Speed based navigation method is natural way for providing interactive ,user controlled audio Browsing. - This Interface combines visual browsing with time synchronized audio skimming . - Using AV Zoom slider users will be able to find relevant information faster.

  13. Conclusion - Speed/position based and audio/visual-based navigation complement each other. - User controlled techniques are described. - Future work addresses the system controlled approaches related to browsing behaviors performed with AV Zoom slider

  14. Advanced User Interfaces for dynamic Video Browsing

  15. Introduction • In this paper different user interfaces are described which solves the scaling problem in the context of video recordings are presented. • The goal is to present a slider like interface whose overall behavior is independent of particular document’s length and enables user to browse the video file at a very fine granularity as wells at a coarse level.

  16. Types of Interfaces • NL Slider -It solves the scaling problem by using non linear slider scale. - Advantage is whole scale always stays within the application window and does not expand across the window’s border. - It enables user to navigate through random parts of the file at a fine or coarse level.

  17. Types of Interfaces • Elastic Skimming Slider - It solves the scaling problem by enabling a user to manipulate the scrolling speed. - It is based loosely on the concept of elastic interfaces. - If the tension on the rubber-band increases the scrolling speed becomes faster. - If the tension get looser, scrolling speed decreases.

  18. Conclusion • All interfaces described have been evaluated and their feasibility and usefulness was proven in a number of usability studies. • Which interface to pick for integration in an actual system strongly depends on the corresponding application, the documents and task to be performed by the users.

  19. Interactive Video Browsing On Mobile Devices

  20. Introduction • A new interface is proposed for the pen based navigation of videos on PDAs and multimedia cell phones • Mobile Zoom slider- enables users to skim a video along the time line on different granularity levels. • It allows for continuous manipulation of replay speed for browsing purposes.

  21. Computers Vs Mobile devices • Performance-Low battery life, design and size of the devices. • Input devices- much fewer buttons laid in special way. • Screen size- Mobile and handheld devices have natural limit for screen size.

  22. Mobile Zoom Slider Interface • Position Based Navigation - The idea of this Zoom slider is to provide scrolling functionality to the user by just clicking on the screen. - If a user moves the pen horizontally at the bottom of the screen, the same scale is used as in the timeline of the original slider. - If one clicks at the upper part of the display, the finest possible scale is used, that is one pixel on the screen corresponds to one frame in the video.

  23. Cont>> • Advantages - Interactions starts easily by clicking anywhere on the screen . - There is no need to explicitly set the scale for fine and coarse scrolling because the second dimension is used to manipulate this parameter.

  24. Mobile Zoom Slider Interface • Speed Based Navigation - A “Speed Border” is introduced to this Zoom slider. - If the user reaches the right border of the window, speed based navigation in the file is invoked.

  25. Cont>> • Implementation of the mobile zoom slider differs significantly from the desktop PC because of several performance issues. • The implementation of position based navigation worked well and offers smooth visual feedback during scrolling even at coarser granularity level. • The implementation of speed based navigation have limitations for higher replay speed .

  26. Mobile Zoom slider offers much more functionality than traditional mobile video interfaces. It enables users to perform search and browsing tasks. Evaluation

  27. Conclusion • A new interface for video browsing on pen-based handheld was presented. • It provides a large range of functionalities. • Further direction for future work include integration of audio feedback during speed based browsing for replay speeds in hand held devices.

  28. References • Interactive Audio-Visual Video Browsing Wolfgang Hurst. • Advanced User Interfaces for dynamic Video Browsing Wolfgang Hurst, George Gotz, Philipp Jarvers. • Interactive video browsing on mobile devices Wolfgang Hurst, George Gotz, Martene Welte.

  29. THANK YOU

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