Results 11 to 20 of about 16,167 (158)

Texture Mapping on NURBS Surface

open access: yesProceedings, 2018
Texture mapping allows high resolution details over 3D surfaces. Nevertheless, texture mapping has a number of unresolved problems such as distortion, boundary between textures or filtering. On the other hand, NURBS surfaces are usually decomposed into a
Sergio Vázquez, Margarita Amor
doaj   +1 more source

Information hiding through variance of the parametric orientation underlying a B-rep face [PDF]

open access: yes, 2008
Watermarking technologies have been proposed for many different,types of digital media. However, to this date, no viable watermarking techniques have yet emerged for the high value B-rep (i.e.
Corney, Jonathan   +2 more
core   +1 more source

Systems Issues in Solid Freeform Fabrication [PDF]

open access: yes, 1992
This paper is concerned with the systems aspects of the Solid Freeform Fabrication (SFF) technology, i.e., the issues that deal with getting an external geometric CAD model to automatically control the physical layering fabrication process as directly as
Wozny, Michael
core   +1 more source

Large Depth-of-Field, Large Eyebox, and Wide Field-of-View Freeform-Holographic Augmented Reality Near-Eye Display. [PDF]

open access: yesAdv Sci (Weinh)
This study proposes an augmented reality (AR) near‐eye display system that simultaneously achieves a large depth‐of‐field (DOF) from 0.25 to 10 m, a wide 50° field‐of‐view (FOV), and a 10 mm × 10 mm viewing eyebox, while maintaining high display performance, good optical see‐through viewing capability, and a compact system form factor.
Wang Y, Yang T, Lyu X, Cheng D, Wang Y.
europepmc   +2 more sources

Segmentation and semantic labelling of RGBD data with convolutional neural networks and surface fitting [PDF]

open access: yes, 2017
We present an approach for segmentation and semantic labelling of RGBD data exploiting together geometrical cues and deep learning techniques. An initial over-segmentation is performed using spectral clustering and a set of non-uniform rational B-spline ...
Minto, Ludovico   +2 more
core   +1 more source

An Isogeometric Analysis Approach to Kinematics of Spatial Rigid Multibody Systems with Imperfect Joints [PDF]

open access: yesModeling, Identification and Control, 2020
This paper proposes a novel generic methodology for kinematics of spatial rigid-multibody systems with and without lubricated joints. In this method CAD surface representations in the form of non-uniform rational B-splines (NURBS) are used to address the
Remzija Cerimagic   +3 more
doaj   +1 more source

A priori error for unilateral contact problems with Lagrange multiplier and IsoGeometric Analysis [PDF]

open access: yes, 2018
In this paper, we consider unilateral contact problem without friction between a rigid body and deformable one in the framework of isogeometric analysis.
Antolin, Pablo   +2 more
core   +2 more sources

Five-Axis Tool Path Generation of Injection Mold Represented by T-Spline Surface

open access: yesAdvances in Polymer Technology, 2020
Injection molding is widely used in industries to produce polymeric products. At present, compound NURBS surfaces are commonly used to represent freeform surfaces in mold models.
Ce Shang   +5 more
doaj   +1 more source

T-Spline Surface Toolpath Generation Using Watershed-Based Feature Recognition

open access: yesApplied Sciences, 2020
The freeform surface is treated as a single machining region for most traditional toolpath generation algorithms. However, due to the complexity of a freeform surface, it is impossible to produce a high-quality surface using one unique machining process.
Yazui Liu, Gang Zhao, Pengfei Han
doaj   +1 more source

Biomimetic Design and Fabrication of Interior Architecture of Tissue Scaffolds Using Solid Freeform Fabrication [PDF]

open access: yes, 2004
Modeling, design and fabrication of tissue scaffolds with intricate architecture, porosity and pore size for desired tissue properties presents a challenge in tissue engineering.
Bradburyq, T.   +4 more
core   +1 more source

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