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ICMCS
2009
IEEE

Accurate alignment of presentation slides with educational video

8 years 3 days ago
Accurate alignment of presentation slides with educational video
Spatio-temporal alignment of electronic slides with corresponding presentation video opens up a number of possibilities for making the instructional content more accessible and understandable, such as video quality improvement, better content analysis and novel compression approaches for low bandwidth access. However, these applications need finding accurate transformations between slides and video frames, which is quite challenging in capture settings using pan-tiltzoom (PTZ) cameras. In this paper we present a nonlinear optimization approach for accurate registration of slide images to video frames. Instead of estimating the projective transformation (i.e., homography) between a single pair of slide and frame images, we solve a set of homographies jointly in a frame sequence that is associated with a given slide. Quantitative evaluation confirms that this substantively improves alignment accuracy.
Quanfu Fan, Kobus Barnard, Arnon Amir, Alon Efrat
Added 19 Feb 2011
Updated 19 Feb 2011
Type Journal
Year 2009
Where ICMCS
Authors Quanfu Fan, Kobus Barnard, Arnon Amir, Alon Efrat
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