filename     : Kra09.pdf
entry        : inproceedings
conference   : SIGGRAPH 2009, Yokohama, Japan, 16 - 19 December 2009
pages        : 126:1 - 126:10
year         : 2009
month        : 
title        : A System for Retargeting of Streaming Video
subtitle     :
author       : Philipp Krähenbühl, Manuel Lang, Alexander Hornung, Markus Gross
booktitle    : SIGGRAPH '09: ACM SIGGRAPH 2009 papers
location     : Yokohama, Japan
ISSN/ISBN    :
editor       : 
publisher    : ACM Press / ACM SIGGRAPH
publ.place   : 
volume       : 
issue        : 
language     : English
keywords     : Video retargeting, warping, content-awareness, art-directability, EWA splatting, user study
abstract     : 
We present a novel, integrated system for content-aware video retargeting.
A simple and interactive framework combines key frame based constraint editing
with numerous automatic algorithms for video analysis. This combination gives
content producers high level control of the retargeting process. The central
component of our framework is a non-uniform, pixel-accurate warp to the target
resolution which considers automatic as well as interactively defined features.
Automatic features comprise video saliency, edge preservation at the pixel
resolution, and  scene cut detection  to enforce bilateral temporal coherence.
Additional high level constraints can be added by the producer to guarantee a
consistent scene composition across arbitrary output formats. For high quality
video display we adopted a 2D version of EWA splatting eliminating aliasing
artifacts known from previous work. Our method seamlessly integrates into
postproduction and computes the reformatting in realtime. This allows us to
retarget annotated video streams at a high quality to arbitary aspect ratios
while retaining the intended cinematographic scene composition. For evaluation
we conducted a user study which revealed a strong viewer preference for our method.