Download PDF by Arnon Amir, Savitha Srinivasan, Dulce Ponceleon (auth.),: Video Mining

By Arnon Amir, Savitha Srinivasan, Dulce Ponceleon (auth.), Azriel Rosenfeld, David Doermann, Daniel DeMenthon (eds.)

ISBN-10: 1441953833

ISBN-13: 9781441953834

ISBN-10: 1475769288

ISBN-13: 9781475769289

Traditionally, clinical fields have outlined barriers, and scientists paintings on examine difficulties inside of these limitations. besides the fact that, every now and then these limitations get shifted or blurred to adapt new fields. for example, the unique target of desktop imaginative and prescient was once to appreciate a unmarried photo of a scene, through determining items, their constitution, and spatial preparations. This has been known as picture figuring out. lately, laptop imaginative and prescient has progressively been making the transition clear of knowing unmarried photos to studying photograph sequences, or video Video figuring out offers with realizing of video knowing. sequences, e.g., acceptance of gestures, actions, facial expressions, and so forth. the most shift within the vintage paradigm has been from the popularity of static gadgets within the scene to motion-based acceptance of activities and occasions. Video realizing has overlapping study issues of different fields, as a result blurring the mounted obstacles. special effects, photo processing, and video databases have obvi­ ous overlap with desktop imaginative and prescient. the most aim of special effects is to generate and animate life like taking a look photos, and video clips. Re­ searchers in special effects are more and more using innovations from desktop imaginative and prescient to generate the artificial imagery. an excellent examination­ pIe of this is often image-based rendering and modeling recommendations, within which geometry, visual appeal, and lights is derived from actual photographs utilizing desktop imaginative and prescient innovations. the following the shift is from synthesis to analy­ sis by way of synthesis. snapshot processing has continually overlapped with computing device imaginative and prescient simply because they either inherently paintings without delay with images.

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The horizontal line is the maximum value among this sampIe group. 4(a). Fine Matching. After discarding mosaic pairs which had diagonal paths with large distance values, we refine the measure of their closeness, in order to detect false positives and to more accurately determine physical background similarity. In this finer stage we only compare the cropped parts of the mosaics, applying a more precise and restrictive method than the one used in the coarse stage. 4(b). Note that the mosaics are matched correctly even though there are scale and viewpoint differences, and the occluding foreground is cropped out.

P. Tubach, "Voice transformation using PSOLA technique", Speech Communications, 11:175-187, 1992. W. Verhelst, M. Roelands, "An overlap-add technique based on waveform similarity (WSOLA) for high quality time-scale modification of speech", IEEE International Conference on Acoustics, Speech, and Signal Processing ICASSP-93, VoLII, pp. 554-557, 1993. H. D. Wactlar, M. G. Christei, Y. Gong and A. G. 66-73, Feb 1999. M. M. Yeung, B. L. Yeo, W. Wolf and B. Liu, "Video Browsing using Clustering and Scene Transitions on Compressed Sequences.

Another example is a zoom shot; the zoomed-out portion of the shot will most likely show a wider view of the background, hence expose more parts of the physical setting. Detecting "good" shots is done by examining the registration transformations computed between consecutive frames in the shot. By analyzing these transformations, we classify shots as panning (or tracking), zoomed-in, zoomed-out, or stationary. We compute affine transformations instead of projective transformations, that describe more accurately the motion within the each shot, but might cause projective distortions in the generated mosaic.

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Video Mining by Arnon Amir, Savitha Srinivasan, Dulce Ponceleon (auth.), Azriel Rosenfeld, David Doermann, Daniel DeMenthon (eds.)


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