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Video-based rendering
| Details |
Inventors: Szeliski, Richard S.; Salesin, David; Schodl, Arno;
Assignee: Microsoft Corporation (Redmond, WA)
Primary Examiner: Padmanabhan; Mano
Assistant Examiner:
Attorney, Agent or Firm: Lyon & Harr, LLP, Lyon; Richard T.
A system and process for generating a new video sequence from frames taken from an input video clip. Generally, this involves computing a similarity value between each of the frames of the input video clip and each of the other frames. For each frame, the similarity values associated therewith are analyzed to identify potentially acceptable transitions between it and the remaining frames. A transition is considered acceptable if it would appear smooth to a person viewing a video containing the frames, or at least if the transition is one of the best available. A new video sequence is then synthesized using the identified transitions to specify an order in which the frames associated with these transitions are to be played. Finally, the new video sequence is rendered by playing the frames of the input video clip in the order specified in the synthesizing procedure. This rendering procedure can include a smoothing action in which those transitions that were deemed acceptable, but would not appear smooth to a viewer, are smoothed to lessen the discontinuity. This general process can be used to generate continuous video sequences or fixed-length, loopable sequences. In addition, the process can be extended to process areas of independent motion in the input video clip separately and then recombine them during the rendering procedure, separate video texture elements from their backgrounds so that they can be used as video sprites. |
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DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In the following description of the preferred embodiments of the present invention, reference is made to the accompanying drawings which form a part hereof, and in which is shown by way of illustration specific embodiments in which the invention may be practiced.
It is understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the present invention.
This invention is directed toward a system and process for synthesizing a continuous or a selectable length video of a scene from a sampling of actual video images of the scene.
This synthesis is possible whenever motion in a real-world scene exhibits some repetitive pattern.
Such repetitive patterns are quite common.
For example, a waving flag, balloons blowing in the wind, a flickering flame, a person or animal running/walking, birds flying, or fish swimming are just a few of the many motions that exhibit some degree of repetitiveness.
It would be very useful to synthesize continuous video sequences of such scenes for example as use as screen savers or "living photographs" where the subject and background scene move.
Likewise, it would be very useful to synthesize fixed length videos of such scenes where the length is entirely selectable by a user.
It would also sometimes be useful to be able to shorten or lengthen an existing piece of video footage.
Before providing a description of the preferred embodiments of the present invention, a brief, general description of a suitable computing environment in which the invention may be implemented will be described.
FIG.
1 illustrates an example of a suitable computing system environment 100.
The computing system environment 100 is only one example of a suitable computing environment and is not intended to suggest any limitation as to the scope of use or functionality of the invention.
Neither should the computing environment 100 be interpreted as having any dependency or requirement relating to any one or combination of components illustrated in the exemplary operating environment 100
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File Sharing 
