Q-Warping: Direct Computation of Quadratic Reference Surfaces

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Q-Warping: Direct Computation of Quadratic Reference Surfaces
We consider the problem of wrapping around an object, of which two views are available, a reference surface and recovering the resulting parametric flow using direct computations (via spatio-temporal derivatives). The well known examples are affine flow models and 8-parameter flow models -- both describing a flow field of a planar reference surface. We extend those classic flow models to deal with a Quadric reference surface and work out the explicit parametric form of the flow field. As a result we derive a simple warpingalgorithmthat maps between two views and leaves a residual flow proportional to the 3D deviation of the surface from a virtual quadric surface. The applications include image morphing, model building, image stabilization, and disparate view correspondence.
Yonatan Wexler, Amnon Shashua
Added 12 Oct 2009
Updated 30 Oct 2009
Type Conference
Year 1999
Where CVPR
Authors Yonatan Wexler, Amnon Shashua
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