ACM SIGGRAPH 2005 Papers
Efficient gradient-domain compositing using quadtrees
ACM SIGGRAPH 2007 papers
Moving gradients: a path-based method for plausible image interpolation
ACM SIGGRAPH 2009 papers
Coordinates for instant image cloning
ACM SIGGRAPH 2009 papers
GradientShop: A gradient-domain optimization framework for image and video filtering
ACM Transactions on Graphics (TOG)
Multigrid and multilevel preconditioners for computational photography
Proceedings of the 2011 SIGGRAPH Asia Conference
Video composition by optimized 3D mean-value coordinates
Computer Animation and Virtual Worlds
Using photographs to enhance videos of a static scene
EGSR'07 Proceedings of the 18th Eurographics conference on Rendering Techniques
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This paper presents a new framework for seamless video editing in the gradient domain. The spatio-temporal gradient fields of target videos are modified or mixed to generate a new gradient field, which is usually not integrable. We propose a 3D video integration algorithm, which finds a potential function, whose gradient field is closest to the resulting gradient field in the sense of least squares. The video is reconstructed by solving a 3D Poisson equation. We use a fast and accurate 3D discrete Poisson solver using diagonal multigrids. A set of gradient operators are defined for user interaction. The resulting video has temporal coherency and no artifacts. We evaluate our algorithm using a variety of examples.