Dynamic Surface Deformation and Modeling Using Rubber Sweepers

We introduce a new surface deformation and modeling method in this paper. Referring to the swept volume generation, the surface is pulled or pushed along a trajectory curve. The key point is the sweeping function. Surface points are moved to where they should be during sweeping operations according to the global parameter, which is determined by topological distance. An index factor controls how much the surface deforms around the handle point. The proposed method is easy to extend to fit different applications such as various constraints, local deformation and animations. ? Springer-Verlag Berlin Heidelberg 2006.EI

Shape Independent Coding Using NURBS and Bézier Approximation and Interpolation Curves

In this paper a scheme of utilizing shape independent basis functions for the hierarchical multiresolution image compression is shown. For a given image texture region segmentation method is used. Following polygonal approximation of created segments causes a degradation of their boundaries. Using NURBS and Bezier interpolation and approximation segments' boundaries are created, thus achieving an image mask. As an input of the three-level hierarchical encoder this image mask and image are used. The image mask and image are subsampled by a factor of 2 on each level. The hierarchical encoder encodes them shape independently. Especially for a very low bit rate image coding gives better results for objective criteria (PSNR). For segment approximation the 2D shape independent orthogonal transform (DCT II) is used. Splines encoding and decoding is very efficient, because only their control points need to be stored. The segment is coded with a modified code similar to the JPEG code