Research Interests:

Computer Graphics, Geometric Modeling, Subdivision Surface Techniques,  Surface Rendering, GPU Algorithms, GPU Ray Tracing.

 Education:

• Ph.D. Computer Science, University of Washington. 1992. Dissertation: "Generalized B-spline Surfaces of Arbitrary Topological Type".

• M.S. Mathematics, University of Utah. 1987. Thesis: "Smooth Subdivision Surfaces Based on Triangles".

 MSR Publications:

• Matthias Niessner, Charles Loop, and Guenter Greiner. "Efficient Evaluation of Semi-Smooth Creases in Catmull-Clark Subdivision Surfaces". Eurographics Proceedings, Cagliari, 2012

• Matthias Niessner, Charles Loop, Mark Meyer, and Tony DeRose. "Feature Adaptive GPU Rendering of Catmull-Clark Subdivision Surfaces". ACM Transactions on Graphics, Vol. 31 No. 1 Article 6 January 2012

• Charles Loop, Matthias Niessner, and Christian Eisenacher. "Effective Back-Patch Culling for Hardware Tessellation". Proceedings of Vision, Modeling & Visualization, Berlin, 2011

• Charles Loop. "Hardware Subdivision and Tessellation of Catmull-Clark Surfaces". Microsoft Research Technical Report, MSR-TR-2010-163. 2010

• Christian Eisenacher and Charles Loop. "Data-parallel Micropolygon Rasterization". Eurographics Proceedings, Norrköping, 2010

• Kirill Garanzha and Charles Loop. "Fast Ray Sorting and Breadth-First Packet Traversal for GPU Ray Tracing". Eurographics Proceedings, Norrköping, 2010

• Charles Loop, Scott Schaefer, Tianyun Ni and Ignacio Castano. "Approximating Subdivision Surfaces with Gregory Patches for Hardware Tessellation". Siggraph Asia Proceedings, Yokohama, 2009

• Charles Loop and Christian Eisenacher. "Real-Time Patch-Based Sort-Middle Rendering on Massively Parallel Hardware". Microsoft Research Technical Report, MSR-TR-2009-83. 2009

• Christian Eisenacher, Quirin Meyer and Charles Loop. "Real-Time View-Dependent Rendering of Parametric Surfaces". I3D '09: Proceedings of the 2009 Symposium on Interactive 3D Graphics and Games, Boston, 2009

• Charles Loop and Scott Schaefer. "G2 Tensor Product Splines over Extraordinary Vertices". Proceedings of the Symposium on Geometry Processing, Coppenhagen, Denmark 2008 Download basis functions.

• Charles Loop and Scott Schaefer. "Approximating Catmull-Clark Subdivision Surfaces with Bicubic Patches". ACM Transactions on Graphics, Vol. 27 No. 1 Article 8 March 2008

• Charles Loop and Jim Blinn. "Rendering Vector Art on the GPU". GPU Gems 3, Chapter 25, Addison Wesley, 2007 Errata.

• Charles Loop and Jim Blinn. "Real-Time GPU Rendering of Piecewise Algebraic Surfaces". Siggraph Proceedings, Boston, 2006

• Charles Loop and Jim Blinn. "Resolution Independent Curve Rendering using Programmable Graphics Hardware". Siggraph Proceedings, pages 1000-1010, Los Angeles, 2005

• Charles Loop. "Second Order Smoothness over Extraordinary Vertices". Proceedings of the Symposium on Geometry Processing, pages 169-178, Nice, France, 2004

• Jos Stam and Charles Loop. "Quad/Triangle Subdivision". Computer Graphics Forum. Volumn 22, Number 1, 2003, pages 1-7

• Charles Loop. "Smooth Ternary Subdivision of Triangle Meshes". Curve and Surface Fitting: St. Malo 2002

• Charles Loop. "Bounded Curvature Triangle Mesh Subdivision with the Convex Hull Property". The Visual Computer, (2002) 18:316-325. Synopsis.

• Z. Zhang and C. Loop. "Estimating the Fundamental Matrix by Transforming Image Points in Projective Space". Computer Vision and Image Understanding, 82(2):174-180, 2001.

• Z. Zhang, Y. Shan and C. Loop. "Object Modeling from a Casual Collection of Images". In the Fourth Asian Conference on Computer Vision (ACCV), pages 905-910, Taipei, Taiwan, January 2000.

• Charles Loop. "Managing Adjacency in Triangular Meshes". Microsoft Research Technical Report, MSR-TR-2000-24. 2000

• C. Loop and Z. Zhang. "Computing Rectifying Homographies for Stereo Vision". IEEE Conf. Computer Vision and Pattern Recognition (CVPR'99), Vol.I, pages 125-131, Colorado, June 1999.