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  4. 2011
Showing papers in "Computers & Graphics in 2011"
Journal Article•10.1016/J.CAG.2011.04.004•
Mobile Augmented Reality: Robust detection and tracking of annotations for outdoor augmented reality browsing

[...]

Tobias Langlotz1, Claus Degendorfer1, Alessandro Mulloni1, Gerhard Schall1, Gerhard Reitmayr1, Dieter Schmalstieg1 •
Graz University of Technology1
01 Aug 2011-Computers & Graphics
TL;DR: An enhanced approach for registering and tracking such anchor points, which is suitable for current generation mobile phones and can also successfully deal with the wide variety of viewing conditions encountered in real life outdoor use is presented.

245 citations

Journal Article•10.1016/J.CAG.2010.11.015•
Technical Section: Using color in visualization: A survey

[...]

Samuel Silva1, Beatriz Sousa Santos1, Joaquim Madeira1•
University of Aveiro1
01 Apr 2011-Computers & Graphics
TL;DR: This survey presents an overview on the subject of color scales by focusing on important guidelines, experimental research work and tools proposed to help non-expert users.

229 citations

Journal Article•10.1016/J.CAG.2010.11.009•
Semantic 3D Media and Content: A semantic-based platform for the digital analysis of architectural heritage

[...]

Livio De Luca1, Chawee Busayarat2, Chiara Stefani2, Philippe Veron2, Michel Florenzano1 •
École Normale Supérieure1, Arts et Métiers ParisTech2
01 Apr 2011-Computers & Graphics
TL;DR: The proposed approach aims to organize multiple representations (and associated information) around a semantic description model with the goal of defining a system for the multi-field analysis of buildings.

181 citations

Journal Article•10.1016/J.CAG.2010.11.011•
Semantic 3D Media and Content: A declarative approach to procedural modeling of virtual worlds

[...]

R.M. Smelik, Tim Tutenel1, K. J. De Kraker, Rafael Bidarra1•
Delft University of Technology1
01 Apr 2011-Computers & Graphics
TL;DR: A novel declarative modeling approach that enables designers to concentrate on stating what they want to create instead of on describing how they should model it, and which represents a significant step towards providing more user control and flexibility in procedural modeling of virtual worlds.

117 citations

Journal Article•10.1016/J.CAG.2010.12.006•
Visual Computing in Biology and Medicine: Interactive 3D medical image segmentation with energy-minimizing implicit functions

[...]

Frank Heckel, Olaf Konrad, Horst K. Hahn, Heinz-Otto Peitgen
01 Apr 2011-Computers & Graphics
TL;DR: An interactive segmentation method for 3D medical images that reconstructs the surface of an object using energy-minimizing, smooth, implicit functions called variational interpolation is presented and how to speed up the algorithm to achieve almost real-time calculation times while preserving the overall segmentation quality is shown.

94 citations

Journal Article•10.1016/J.CAG.2011.01.006•
Cultural Heritage: Multiview 3D reconstruction of the archaeological site at Weymouth from image series

[...]

Benjamin Ducke1, David Score1, Joseph Reeves1•
University of Oxford1
01 Apr 2011-Computers & Graphics
TL;DR: This report presents a multiview reconstruction tool chain composed from various freely available, open source components and a practical application example in the form of a 3D model of an archaeological site.

85 citations

Journal Article•10.1016/J.CAG.2010.09.010•
Technical Section: Robust and blind mesh watermarking based on volume moments

[...]

Kai Wang1, Guillaume Lavoué1, Florence Denis1, Atilla Baskurt1•
University of Lyon1
01 Feb 2011-Computers & Graphics
TL;DR: A robust and blind watermarking algorithm for three-dimensional (3D) meshes that embeds the watermark through a modified scalar Costa quantization of the zero-order volume moments of some selected candidate patches.

83 citations

Journal Article•10.1016/J.CAG.2011.05.002•
Editorial: Special Section on Mobile Augmented Reality

[...]

Ronald Azuma1, Mark Billinghurst2, Gudrun Klinker3•
Nokia1, University of Canterbury2, Technische Universität München3
01 Aug 2011-Computers & Graphics
TL;DR: This special section contains seven papers on mobile AR, covering a range of topics from tracking, user studies, visualization, and collaborative applications.

79 citations

Journal Article•10.1016/J.CAG.2011.07.003•
Technical Section: An extended iterative format for the progressive-iteration approximation

[...]

Hongwei Lin1, Zhiyu Zhang1•
Zhejiang University1
01 Oct 2011-Computers & Graphics
TL;DR: An extended PIA (EPIA) format is developed, which allows that the number of the control points is less than that of the given data points, and which has great potential in large scale data fitting.

76 citations

Journal Article•10.1016/J.CAG.2011.01.015•
Cultural Heritage: Symmetry and template guided completion of damaged skulls

[...]

Xin Li1, Zhao Yin2, Li Wei2, Shenghua Wan1, Wei Yu2, Maoqing Li2 •
Louisiana State University1, Xiamen University2
01 Aug 2011-Computers & Graphics
TL;DR: This proposed completion framework will iteratively conduct symmetry-based and template-based repairs and will greatly benefit subsequent archeological and anthropological processing and analysis.

71 citations

Journal Article•10.1016/J.CAG.2011.03.001•
Cultural Heritage: Digital preservation and dissemination of ancient lithic technology with modern micro-CT

[...]

Richard L. Abel1, Simon A. Parfitt1, Nick Ashton2, Simon G. Lewis3, Beccy Scott2, Chris Stringer1 •
Natural History Museum1, British Museum2, Queen Mary University of London3
01 Aug 2011-Computers & Graphics
TL;DR: It was found that micro-CT could produce accurate high-resolution ''virtual'' artefacts that resolve features greater than [email protected] and it was possible to visualise the key features of percussion, which distinguish intentionally made flakes from natural breakage.
Journal Article•10.1016/J.CAG.2011.04.005•
Mobile Augmented Reality: Aroundplot: Focus+context interface for off-screen objects in 3D environments

[...]

Hyungeun Jo1, Sungjae Hwang1, Hyunwoo Park1, Jung-hee Ryu1•
KAIST1
01 Aug 2011-Computers & Graphics
TL;DR: Aroundplot is presented, a novel focus+context interface for providing multiple location cues for off-screen objects in an immersive 3D environment that could find the target object for a given location cue faster and more accurately with Aroundplot than with a top-down 2D radar.
Journal Article•10.1016/J.CAG.2011.01.004•
Cultural Heritage: Out-of-core selection and editing of huge point clouds

[...]

Claus Scheiblauer, Michael Wimmer
01 Apr 2011-Computers & Graphics
TL;DR: An out-of-core editing system for point clouds, which allows selecting and modifying arbitrary parts of a huge point cloud interactively, and an algorithm to alleviate the artifacts when rendering a point cloud with large discrepancies in density in different areas by estimating point sizes heuristically.
Journal Article•10.1016/J.CAG.2010.11.010•
Semantic 3D Media and Content: Surface partial matching and application to archaeology

[...]

Arik Itskovich1, Ayellet Tal1•
Technion – Israel Institute of Technology1
01 Apr 2011-Computers & Graphics
TL;DR: A probabilistic framework is introduced in which the segmentation and the correspondences of neighboring feature points allow us to enhance or moderate the authors' certainty of a feature-point similarity.
Journal Article•10.1016/J.CAG.2011.03.033•
SMI 2011: Full Paper: Freestyle: Sculpting meshes with self-adaptive topology

[...]

Lucian Stanculescu1, Raphaëlle Chaine1, Marie-Paule Cani2•
University of Lyon1, University of Grenoble2
01 Jun 2011-Computers & Graphics
TL;DR: The insight is that the use of quasi-uniform mesh sampling, an interesting option now that very large meshes can be edited and displayed in real-time, provides the right framework for expressing and efficiently processing arbitrary changes of topological genus.
Journal Article•10.1016/J.CAG.2011.03.016•
Short Communication to SMI 2011: Surface feature based mesh segmentation

[...]

Jun Wang1, Zeyun Yu1•
University of Wisconsin-Madison1
01 Jun 2011-Computers & Graphics
TL;DR: This paper presents a novel algorithm of mesh segmentation from original scanning data points, which essentially consists of three steps: normal based initial decomposing, further segmentation based on curvature criteria and Gauss mapping, followed by the detection of quadric surface features.
Journal Article•10.1016/J.CAG.2011.03.025•
Short Communication to SMI 2011: Computation of the minimum distance between two Bézier curves/surfaces

[...]

Jung-Woo Chang1, Yi-King Choi1, Myung Soo Kim2, Wenping Wang1•
University of Hong Kong1, Seoul National University2
01 Jun 2011-Computers & Graphics
TL;DR: An efficient and robust method based on the culling approach for computing the minimum distance between two Bezier curves or Beziers surfaces is presented.
Journal Article•10.1016/J.CAG.2011.03.018•
SMI 2011: Full Paper: A topology-preserving optimization algorithm for polycube mapping

[...]

Shenghua Wan1, Zhao Yin2, Kang Zhang1, Hongchao Zhang1, Xin Li1 •
Louisiana State University1, Xiamen University2
01 Jun 2011-Computers & Graphics
TL;DR: An iterative algorithm to seek for the optimal polycube domain and mapping, with the constraint on using a restricted number of cubes, and an effective optimization framework to compute polycube mapping are presented.
Journal Article•10.1016/J.CAG.2011.03.030•
Short Communication to SMI 2011: Affine-invariant geodesic geometry of deformable 3D shapes

[...]

Dan Raviv1, Alexander M. Bronstein2, Michael M. Bronstein, Ron Kimmel1, Nir Sochen2 •
Technion – Israel Institute of Technology1, Tel Aviv University2
01 Jun 2011-Computers & Graphics
TL;DR: By re-defining the surface metric as its equi-affine version, the surface with its modified metric tensor can be treated as a canonical Euclidean object on which most classical Euclidesan processing and analysis tools can be applied.
Journal Article•10.1016/J.CAG.2011.03.040•
Semantic 3D Media and Content: Semantics and 3D media: Current issues and perspectives

[...]

Chiara Eva Catalano, Michela Mortara, M. Spagnuolo, Bianca Falcidieno
01 Aug 2011-Computers & Graphics
TL;DR: This paper identified four grand challenges which synthesise the open issues in common to the considered fields and represent a roadmap towards semantic 3D media and gives an overview of the various aspects of semantics required to optimise tasks and processes related to 3D content in different application domains.
Journal Article•10.1016/J.CAG.2011.03.005•
SMI 2011: Full Paper: Interactive 3D caricature from harmonic exaggeration

[...]

Thomas Lewiner1, Thales Vieira, Dimas Martínez, Adelailson Peixoto, Vinícius Mello, Luiz Velho2 •
Pontifical Catholic University of Rio de Janeiro1, Instituto Nacional de Matemática Pura e Aplicada2
01 Jun 2011-Computers & Graphics
TL;DR: This work introduces a caricature tool that interactively emphasizes the differences between two three-dimensional meshes, represented in the manifold harmonic basis of the shape to be caricatured, providing intrinsic controls on the deformation and its scales.
Journal Article•10.1016/J.CAG.2010.11.014•
Technical Section: View-dependent pruning for real-time rendering of trees

[...]

Jesús Gumbau1, Miguel Chover1, Inmaculada Remolar1, Cristina Rebollo1•
James I University1
01 Apr 2011-Computers & Graphics
TL;DR: This work interactsively reduce the amount of geometry needed to represent the foliage through a view-dependent multiresolution scheme, and introduces a new management system for efficiently handling level of detail objects in order to improve performance for forest scenes.
Journal Article•10.1016/J.CAG.2010.11.006•
Extended papers from NPAR 2010: Scale-dependent and example-based grayscale stippling

[...]

Domingo Martín1, Germán Arroyo1, M. Victoria Luzón1, Tobias Isenberg2•
University of Granada1, University of Groningen2
01 Feb 2011-Computers & Graphics
TL;DR: In this article, an example-based approach to synthesize stipple illustrations for static 2D images that produces scale-dependent results appropriate for an intended spatial output size and resolution is presented.
Journal Article•10.1016/J.CAG.2011.01.008•
Visual Computing in Biology and Medicine: A multi-front eikonal model of cardiac electrophysiology for interactive simulation of radio-frequency ablation

[...]

Erik Pernod1, Maxime Sermesant2, Ender Konukoglu3, Jatin Relan1, Hervé Delingette1, N. Ayache1 •
French Institute for Research in Computer Science and Automation1, King's College London2, Microsoft3
01 Apr 2011-Computers & Graphics
TL;DR: A fast model of the cardiac electrophysiology based on an eikonal formulation implemented with an anisotropic fast marching method is proposed and demonstrated in the context of a simulator of radio-frequency ablation of cardiac arrhythmia from patient-specific medical imaging data.
Journal Article•10.1016/J.CAG.2011.04.007•
Mobile Augmented Reality: Real-time and accurate extrinsic camera parameter estimation using feature landmark database for augmented reality

[...]

Takafumi Taketomi1, Tomokazu Sato1, Naokazu Yokoya1•
Nara Institute of Science and Technology1
01 Aug 2011-Computers & Graphics
TL;DR: The number of matching candidates is reduced to achieve fast camera parameters estimation by tentative camera parameter estimation and by assigning priorities to landmarks, and image templates of landmarks are adequately compensated for by considering the local 3-D structure of a landmark using the dense depth information obtained by a laser range sensor.
Journal Article•10.1016/J.CAG.2011.03.007•
Short Communication to SMI 2011: Reconstruction of 3D objects from 2D cross-sections with the 4-point subdivision scheme adapted to sets

[...]

Shay Kels1, Nira Dyn1•
Tel Aviv University1
01 Jun 2011-Computers & Graphics
TL;DR: This work introduces a new geometric weighted average of two sets, defined for positive weights and when one weight is negative (corresponding to extrapolation) and used to interpolate between cross-sections of a 3D object in a piecewise way.
Journal Article•10.1016/J.CAG.2010.12.005•
Visual Computing in Biology and Medicine: Interactive visual analysis of contrast-enhanced ultrasound data based on small neighborhood statistics

[...]

Paolo Angelelli1, Kim Nylund1, Odd Helge Gilja1, Helwig Hauser1•
University of Bergen1
01 Apr 2011-Computers & Graphics
TL;DR: This paper presents a pipeline that enables interactive visual exploration and semi-automatic segmentation and classification of CEUS data, and proposes a robust method to derive expressive enhancement measures from small spatio-temporal neighborhoods.
Journal Article•10.1016/J.CAG.2011.04.011•
Technical Section: Context-aware mesh smoothing for biomedical applications

[...]

Tobias Moench1, Rocco Gasteiger1, Gábor Janiga1, Holger Theisel1, Bernhard Preim1 •
Otto-von-Guericke University Magdeburg1
01 Aug 2011-Computers & Graphics
TL;DR: This paper presents a method that identifies staircase artifacts which result from image inhomogeneities and binary segmentation in medical image data for subsequent removal by adaptive mesh smoothing, and proves the general suitability of context-aware smoothing.
Journal Article•10.1016/J.CAG.2011.03.006•
SMI 2011: Full Paper: On visual complexity of 3D shapes

[...]

Waqar Saleem1, Alexander Belyaev2, Danyi Wang, Hans-Peter Seidel3•
University of Jena1, Heriot-Watt University2, Max Planck Society3
01 Jun 2011-Computers & Graphics
TL;DR: This work base their approach to computing 3D shape complexity on the (dis)similarity matrix of the shape's 2D views, and introduce measures to compute shape complexity through point dispersion in the resulting MDS plot.
Journal Article•10.1016/J.CAG.2010.12.007•
Virtual Reality in Brazil: Multi-camera calibration based on an invariant pattern

[...]

Manuel Loaiza1, Alberto Raposo1, Marcelo Gattass1•
Pontifical Catholic University of Rio de Janeiro1
01 Apr 2011-Computers & Graphics
TL;DR: The proposed method takes advantage of using a new technique for the capture and recognition of a robust sample of projective invariant patterns, which allows to capture simultaneously more than one invariant pattern in the tracking area and recognize each pattern individually as well as each marker that composes them.
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