The clever part is that we don’t actually have to store all these various loops. In essence, we are traversing a sequence of video loops, from completely static to most dynamic. “One such control is a slider that lets the user adjust the overall level of dynamism. The second contribution of the paper is to show that once we have created the ‘most dynamic video loop,’ we can use information from the optimization to provide the user with simple controls over dynamism in the resulting scene,” says Hoppe. “What is unique over prior work is that in the looping video, regions of pixels can have different looping periods, and these periods are found automatically as part of an optimization algorithm,” says Hoppe.
The automated solution offered by Liao, Joshi, and Hoppe enables each pixel to determine its own looping period. It tries to incorporate as much dynamic content as possible, so it is able to capture more scene activity, including subtle motions like water ripples and swaying grass.” In contrast, ‘automated video looping’ requires no user input. “One can shoot a five-second video of a pretty landscape and generate an animated version of the scene to play on a PC desktop or in a slide show. “We have developed a technique to automatically create an infinitely looping video from a short input video sequence of five to 10 seconds,” explains Hoppe. The research is detailed in a technical paper, written by Zicheng Liao of the University of Illinois at Urbana-Champaign and Neel Joshi and Hugues Hoppe of Microsoft Research Redmond, titled Automated Video Looping with Progressive Dynamism. The MSR research project aims to captures a spectrum of looping videos with varying levels of dynamism, ranging from a static image to a highly animated loop. That should mean, before long, that preserving and sharing bursts of video might become as commonplace as the current practice of exchanging still images. With today’s mobile devices, users can find shooting high-definition video as easy as snapping a photograph. Or the Nokia Cinemagraph the app, same basic concept.
Think of the dynamic (animated) images in the newspapers shown in the Harry Potter films. The emphasis is on creative control-creating contrasting juxtapositions of frozen and dynamic content. Cliplets reanimates a portion of a scene based on user-specified regions and time intervals. A few months back MSR released an app called BLINK for WP8 and recently Cliplets for Windows 8. Microsoft Research has had a long history of looking at bringing static images to life.
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