Les A. Piegl

Konstantinos Dalamagkidis, Kimon P. Valavanis, Les A. Piegl: Nonlinear Model Predictive Control With Neural Network Optimization for Autonomous Autorotation of Small Unmanned Helicopters. IEEE Trans. Contr. Sys. Techn. 19(4): 818-831 (2011)

Konstantinos Dalamagkidis, Kimon P. Valavanis, Les A. Piegl: Autonomous Autorotation of Unmanned Rotorcraft using Nonlinear Model Predictive Control. Journal of Intelligent and Robotic Systems 57(1-4): 351-369 (2010)

Konstantinos Dalamagkidis, Kimon P. Valavanis, Les A. Piegl: Small unmanned helicopter autorotation using non-linear model predictive control. CDC 2010: 6350-6357

Les A. Piegl, Khairan Rajab, Volha Smarodzinava, Kimon P. Valavanis: Using a biarc filter to compute curvature extremes of NURBS curves. Eng. Comput. (Lond.) 25(4): 379-387 (2009)

Kimon P. Valavanis, Paul Y. Oh, Les A. Piegl: Guest Editorial for the Special Volume On Unmanned Aircraft Systems (UAS). Journal of Intelligent and Robotic Systems 54(1-3): 1-2 (2009)

Les A. Piegl, Khairan Rajab, Volha Smarodzinava: Curve interpolation with directional constraints for engineering design. Eng. Comput. (Lond.) 24(1): 79-85 (2008)

Les A. Piegl, Wayne Tiller: Fitting NURBS spherical patches to measured data. Eng. Comput. (Lond.) 24(2): 97-106 (2008)

Konstantinos Dalamagkidis, Kimon P. Valavanis, Les A. Piegl: Current Status and Future Perspectives for Unmanned Aircraft System Operations in the US. Journal of Intelligent and Robotic Systems 52(2): 313-329 (2008)

Les A. Piegl: Ten challenges in computer-aided design. Computer-Aided Design 37(4): 461-470 (2005)

Les A. Piegl: CAD'04 Special Issue: modeling and geometry representations for CAD. Computer-Aided Design 37(8): 781 (2005)

Les A. Piegl: CAD'04 Special Issue: Product design, integration and manufacturing. Computer-Aided Design 37(9): 879 (2005)

Les A. Piegl, Weiyin Ma, Wayne Tiller: An alternative method of curve interpolation. The Visual Computer 21(1-2): 104-117 (2005)

Les A. Piegl: Special issue on automated synthesis of human-competitive designs by means of genetic programming. Computer-Aided Design 36(12): 1279 (2004)

Les A. Piegl, Wayne Tiller: Circle approximation using integral B-splines. Computer-Aided Design 35(6): 601-607 (2003)

Les A. Piegl, Wayne Tiller: Approximating Surfaces of Revolution by Nonrational B-Splines. IEEE Computer Graphics and Applications 23(3): 46-52 (2003)

Les A. Piegl, Weiyin Ma, Wayne Tiller: Surface Fitting to Random Data via Constrained Shaping. International Journal of Shape Modeling 9(1): 1-20 (2003)

Les A. Piegl, Wayne Tiller: Algorithm for finding all k nearest neighbors. Computer-Aided Design 34(2): 167-172 (2002)

Les A. Piegl, Wayne Tiller: Biarc approximation of NURBS curves. Computer-Aided Design 34(11): 807-814 (2002)

Les A. Piegl, Wayne Tiller: Data Approximation Using Biarcs. Eng. Comput. (Lond.) 18(1): 59-65 (2002)

Les A. Piegl, Wayne Tiller: Fitting Circular Arcs to Measured Data. International Journal of Shape Modeling 8(1): 1-21 (2002)

Les A. Piegl, Wayne Tiller: Surface skinning revisited. The Visual Computer 18(4): 273-283 (2002)

Les A. Piegl, Wayne Tiller: Parametrization for surface fitting in reverse engineering. Computer-Aided Design 33(8): 593-603 (2001)

Les A. Piegl, Wayne Tiller: Reducing Control Points in Surface Interpolation. IEEE Computer Graphics and Applications 20(5): 70-74 (2000)

Les A. Piegl, Wayne Tiller: Curve Interpolation with Arbitrary End Derivatives. Eng. Comput. (Lond.) 16(1): 73-79 (2000)

Les A. Piegl, Wayne Tiller: Least-Squares B-Spline Curve Approximation with Arbitary End Derivatives. Eng. Comput. (Lond.) 16(2): 109-116 (2000)

Les A. Piegl, Wayne Tiller: Surface approximation to scanned data. The Visual Computer 16(7): 386-395 (2000)

Les A. Piegl, Wayne Tiller: Computing offsets of NURBS curves and surfaces. Computer-Aided Design 31(2): 147-156 (1999)

Les A. Piegl, Wayne Tiller: Cross-Sectional Design with Boundary Constraints. Eng. Comput. (Lond.) 15(2): 171-180 (1999)

Les A. Piegl, Wayne Tiller: Filling n-sided regions with NURBS patches. The Visual Computer 15(2): 77-89 (1999)

Les A. Piegl, Wayne Tiller: Geometry-based triangulation of trimmed NURBS surfaces. Computer-Aided Design 30(1): 11-18 (1998)

Les A. Piegl, Wayne Tiller: Computing the derivative of NURBS with respect to a knot. Computer Aided Geometric Design 15(9): 925-934 (1998)

Les A. Piegl, Wayne Tiller: The NURBS book (2. ed.). Monographs in visual communication, Springer 1997, isbn 978-3-540-61545-3, pp. I-XIV, 1-646

Les A. Piegl, Wayne Tiller: Symbolic operators for NURBS. Computer-Aided Design 29(5): 361-368 (1997)

Jennifer A. Polack-Wahl, Les A. Piegl, Marc L. Carter: Perception of images using cylindrical mapping. The Visual Computer 13(4): 155-167 (1997)

Les A. Piegl, Wayne Tiller: Algorithm for approximate skinning. Computer-Aided Design 28(9): 699-706 (1996)

Alok K. Chaturvedi, Les A. Piegl: Procedural method for terrain surface interpolation. Computers & Graphics 20(4): 541-566 (1996)

Les A. Piegl, Wayne Tiller: The NURBS book. Monographs in visual communication, Springer 1995, isbn 978-3-540-55069-3, pp. I-XIV, 1-646

Les A. Piegl, Arnaud M. Richard: Tessellating trimmed surfaces. Computer-Aided Design 27(1): 16-26 (1995)

Les A. Piegl, Wayne Tiller: Algorithm for degree reduction of B-spline curves. Computer-Aided Design 27(2): 101-110 (1995)

Les A. Piegl: Editorial. Computer-Aided Design 26(1): 3-5 (1994)

Les A. Piegl, Wayne Tiller: Software-engineering approach to degree elevation of B-spline curves. Computer-Aided Design 26(1): 17-28 (1994)

Tsung-Pao Fang, Les A. Piegl: Algorithm for constained delaunay triangulation. The Visual Computer 10(5): 255-265 (1994)

Les A. Piegl, Arnaud M. Richard: Algorithm and data structure for triangulating multiply connected polygonal domains. Computers & Graphics 17(5): 563-574 (1993)

Les A. Piegl: An introduction to the curves and surfaces of computer-aided design: Robert C Beach Van Nostrand Reinhold, USA. Computer-Aided Design 24(5): 288 (1992)

Tsung-Pao Fang, Les A. Piegl: Algorithm for Delaunay triangulation and convex-hull computation using a sparse matrix. Computer-Aided Design 24(8): 425-436 (1992)

Narayanan Anantakrishnan, Les A. Piegl: Integer de Casteljau Algorithm for Rasterizing NURBS Curves. Comput. Graph. Forum 11(2): 151-162 (1992)

Narayanan Anantakrishnan, Les A. Piegl: Integer subdivision algorithm for rendering NURBS curves. The Visual Computer 8(3): 149-161 (1992)

Les A. Piegl: Happy birthday Pierre Bézier. Computer-Aided Design 22(9): 522 (1990)

Les A. Piegl: A program development for a university course in geometric modeling. Computers & Graphics 14(3-4): 501-504 (1990)

Les A. Piegl: Coons-type patches. Computers & Graphics 12(2): 221-228 (1988)

Les A. Piegl: A fast algorithm for parametric curve plotting. Computers & Graphics 7(3-4): 361-367 (1983)