Academic theme’s stock header 😄
Academic theme’s stock header 😄
Presentation slides are now a de facto standard in most classroom lectures, business meetings, and conference talks. Until recently, electronic presentation materials have been disjointed from each other: the video file and the corresponding slides are typically available separately for viewing or download. In this work, we exploit the fact that video frames of a presentation and the corresponding slides are mapped into one another by a geometric transformation, called a homography. This mapping allows us to synchronize a video with the slides shown in it, enabling users to interactively view presentation materials, and search within and across presentations. We show how we can approximate homographies with affine transformations. Additionally, we introduce a novel approach to slide appearance approximation… Finally, we present the Semantically Linked Instructional Content (SLIC) Portal, an online system for accessing presentations that exploits our slide-video matching. We conducted user studies at the University of Arizona to measure the effect of synchronized presentation materials on learners, and discuss students’ favorable response to the SLIC Portal, which they used during the experiments.