Advances in Geometric Modeling and Processing : 4th International Conference GMP 2006 Pittsburgh PA USA July 26 28 2006 Proceedings Shape Reconstruction Automatic Extraction of Surface Structures in Digital Shape Reconstruction Ensembles for Normal and Surface Reconstructions Adaptive Fourier Based Surface Reconstruction Curves and Surfaces I Least–Squares Approximation by Pythagorean Hodograph Spline Curves Via an Evolution Process Geometric Accuracy Analysis for Discrete Surface Approximation Quadric Surface Extraction by Variational Shape Approximation Geometric Processing I Tracking Point Curve Critical Distances Theoretically Based Robust Algorithms for Tracking Intersection Curves of Two Deforming Parametric Surfaces Subdivision Termination Criteria in Subdivision Multivariate Solvers Towards Unsupervised Segmentation of Semi rigid Low Resolution Molecular Surfaces Curves and Surfaces II Piecewise Developable Surface Approximation of General NURBS Surfaces with Global Error Bounds Efficient Piecewise Linear Approximation of Bézier Curves with Improved Sharp Error Bound Approximate  Bases of Rational Curves and Surfaces Shape Deformation Inverse Adaptation of Hex dominant Mesh for Large Deformation Finite Element Analysis Preserving Form Features in Interactive Mesh Deformation Surface Creation and Curve Deformations Between Two Complex Closed Spatial Spline Curves Shape Description Computing a Family of Skeletons of Volumetric Models for Shape Description Representing Topological Structures Using Cell Chains Constructing Regularity Feature Trees for Solid Models Insight for Practical Subdivision Modeling with Discrete Gauss Bonnet Theorem Shape Recognition Shape Based Retrieval of Articulated 3D Models Using Spectral Embedding Separated Medial Surface Extraction from CT Data of Machine Parts Two Dimensional Selections for Feature Based Data Exchange Geometric Modeling Geometric Modeling of Nano Structures with Periodic Surfaces Minimal Mean Curvature Variation Surfaces and Their Applications in Surface Modeling Parametric Design Method for Shapes with Aesthetic Free Form Surfaces Curves and Surfaces III Control Point Removal Algorithm for T Spline Surfaces Shape Representations with Blossoms and Buds Manifold T Spline Subdivision Surfaces Composite Subdivision Surfaces Tuned Ternary Quad Subdivision Geometric Processing II Simultaneous Precise Solutions to the Visibility Problem of Sculptured Models Density Controlled Sampling of Parametric Surfaces Using Adaptive Space Filling Curves Engineering Applications Verification of Engineering Models Based on Bipartite Graph Matching for Inspection Applications A Step Towards Automated Design of Side Actions in Injection Molding of Complex Parts Finding All Undercut Free Parting Directions for Extrusions Short Papers Robust Three Dimensional Registration of Range Images Using a New Genetic Algorithm Geometrical Mesh Improvement Properties of Delaunay Terminal Edge Refinement Matrix Based Subdivision Depth Computation for Extra Ordinary Catmull Clark Subdivision Surface Patches Hierarchically Partitioned Implicit Surfaces for Interpolating Large Point Set Models A New Class of Non stationary Interpolatory Subdivision Schemes Based on Exponential Polynomials Detection of Closed Sharp Feature Lines in Point Clouds for Reverse Engineering Applications Feature Detection Using Curvature Maps and the Min cut Max flow Algorithm Computation of Normals for Stationary Subdivision Surfaces Voxelization of Free Form Solids Represented by Catmull Clark Subdivision Surfaces Interactive Face Replacements for Modeling Detailed Shapes Straightest Paths on Meshes by Cutting Planes 3D Facial Image Recognition Using a Nose Volume and Curvature Based Eigenface Surface Reconstruction for Efficient Colon Unfolding Spectral Sequencing Based on Graph Distance An Efficient Implementation of RBF Based Progressive Point Sampled Geometry Segmentation of Scanned Mesh into Analytic Surfaces Based on Robust Curvature Estimation and Region Growing Finding Mold Piece Regions Using Computer Graphics Hardware A Method for FEA Based Design of Heterogeneous Objects Time Varying Volume Geometry Compression with 4D Lifting Wavelet Transform A Surface Displaced from a Manifold Smoothing of Meshes and Point Clouds Using Weighted Geometry Aware Bases.