Video of the Diffusion Curves, from SIGGRAPH 2008.
The video presents the "Diffusion Curve" primitives for the creation of soft gradients and blur in vector graphics, along with an image analysis method to automatically extract Diffusion Curves from photographs.
Authors: Alexandrina Orzan, Adrien Bousseau, Holger Winnemöller, Pascal Barla, Joëlle Thollot, David Salesin