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We propose 'evolving time fronts', a new framework for spatio-temporal warping of video. The proposed framework is simple yet general, allowing a large variety of spatio-temporal warps to be specified in an intuitive manner. Specifically, we manipulate the time flow of a video sequence by sweeping an evolving 'time front' surface through the video's aligned space-time volume. Specific strategies for time front evolution are demonstrated to produce a variety of interesting and useful operations on video, ranging from subtle timing changes to eye-catching special effects, creation of dynamic panoramic mosaics, and parallax effects.
A technical report describing the Evolving Time Fronts video warping framework in more details |
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Select the winner in any race. By enabling time to flow differently at different locations in the video, we create new videos with any desired winner. |
Demolition: Customize the way you want the stadium to be blown: Starting at the sides or starting at the center? |
Dynamic Panoramas All water flows down simultaneously in a panoramic view, although each part was captured at a different time! |
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Watch the Dunks! The Magnifying Glass lets you focus on a single action in the video, slowed down and magnified. |
Drawing with Time: The "text over waves" is written merely by shifting time at designated locations. |
Parallax Effects Creating new movies as if taken from new viewpoints is just a special case of the spatio-temporal video warping |