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 Patrick C Marais

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Average citations per article4.85
Citation Count126
Publication count26
Publication years1997-2016
Available for download17
Average downloads per article512.24
Downloads (cumulative)8,708
Downloads (12 Months)609
Downloads (6 Weeks)50
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26 results found Export Results: bibtexendnoteacmrefcsv

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1
October 2016 GCH '16: Proceedings of the 14th Eurographics Workshop on Graphics and Cultural Heritage
Publisher: Eurographics Association
Bibliometrics:
Citation Count: 0

A laser scanning campaign to capture the geometry of a large heritage site can produce thousands of high resolution range scans. These must be cleaned to remove noise and artefacts. To accelerate the cleaning task, we can i) reduce the time required for batch-processing tasks, ii) reduce user interaction time, ...

2
January 2016 HICSS '16: Proceedings of the 2016 49th Hawaii International Conference on System Sciences (HICSS)
Publisher: IEEE Computer Society
Bibliometrics:
Citation Count: 0

Gamification is maturing as an academic research object, but still suffers from growing pains. Challenges identified in a practical gamification activity are used to anchor a discussion of theoretical challenges currently facing gamification. We argue that some of the pain can be attributed to the exceptionalist and formalist definitions of ...

3
May 2015 Computer Graphics Forum: Volume 34 Issue 2, May 2015
Publisher: The Eurographs Association & John Wiley & Sons, Ltd.
Bibliometrics:
Citation Count: 8

The challenge in terrain synthesis for virtual environments is to provide a combination of precise user control over landscape form, with interactive response and visually realistic results.
Keywords: I.3.3 [Computer Graphics]: Three-Dimensional Graphics and Realism-Texture, Categories and Subject Descriptors according to ACM CCS

4 published by ACM
March 2014 I3D '14: Proceedings of the 18th meeting of the ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 1,   Downloads (12 Months): 21,   Downloads (Overall): 128

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Motivated by traditional Chinese landscape painting, in which a single brush and a single colour are used to paint a vivid landscape, we propose a new painting interface for volumetric cloud modelling.

5
February 2014 IEEE Transactions on Visualization and Computer Graphics: Volume 20 Issue 2, February 2014
Publisher: IEEE Educational Activities Department
Bibliometrics:
Citation Count: 0

Modern laser range scanning campaigns produce extremely large point clouds, and reconstructing a triangulated surface thus requires both out-of-core techniques and significant computational power. We present a GPU-accelerated implementation of the moving least-squares (MLS) surface reconstruction technique. We believe this to be the first GPU-accelerated, out-of-core implementation of surface reconstruction ...
Keywords: Octrees,Surface reconstruction,Graphics processing units,Arrays,Indexes,Surface treatment,Approximation methods,out of core,Moving least squares,surface reconstruction,GPU

6 published by ACM
October 2013 SAICSIT '13: Proceedings of the South African Institute for Computer Scientists and Information Technologists Conference
Publisher: ACM
Bibliometrics:
Citation Count: 9
Downloads (6 Weeks): 10,   Downloads (12 Months): 257,   Downloads (Overall): 1,753

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Gamification is the application of game mechanics and player incentives to non-game environments. When designed correctly, gamification has been found to increase engagement and encourage targeted behaviours among users. This paper presents the gamification of a university course in Computer Games Development using an online learning management tool, including how ...
Keywords: active learning, games design, gamification

7 published by ACM
August 2013 Journal on Computing and Cultural Heritage (JOCCH): Volume 6 Issue 3, July 2013
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 3,   Downloads (12 Months): 31,   Downloads (Overall): 212

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Laser range scanning is commonly used in cultural heritage to create digital models of real-world artefacts. A large scanning campaign can produce billions of point samples—too many to be manipulated in memory on most computers. It is thus necessary to spatially partition the data so that it can be processed ...
Keywords: out-of-core, Binning, octree, point cloud

8
May 2013 Autonomous Agents and Multi-Agent Systems: Volume 26 Issue 3, May 2013
Publisher: Kluwer Academic Publishers
Bibliometrics:
Citation Count: 0

Classic shortest path algorithms operate on graphs, which are suitable for problems that can be represented by weighted nodes or edges. Finding a shortest path through a set of weighted regions is more difficult and only approximate solutions tend to scale well. The Field D* algorithm efficiently calculates an approximate, ...
Keywords: Artificial intelligence, Control methods and Search, Data structures and transforms, Perceptual reasoning, Problem solving, Representations, Vision and scene understanding, Graph and tree search strategies

9
September 2012 Computer Graphics Forum: Volume 31 Issue 6, September 2012
Publisher: John Wiley & Sons, Inc.
Bibliometrics:
Citation Count: 7

Curvilinear features extracted from a 2D user-sketched feature map have been used successfully to constraint a patch-based texture synthesis of real landscapes. This map-based user interface does not give fine control over the height profile of the generated terrain. We propose a new texture-based terrain synthesis framework controllable by a ...
Keywords: shading, shadowing and texture, I.3.7 [Computer Graphics]: Three-Dimensional Graphics and Realism—Colour

10 published by ACM
March 2012 I3D '12: Proceedings of the ACM SIGGRAPH Symposium on Interactive 3D Graphics and Games
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 1,   Downloads (12 Months): 28,   Downloads (Overall): 326

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GPU-based ray casting, as introduced by Krüger and Westermann [2003], is an effective method for volumetric rendering. Unfortunately, conventional methods of Empty Space Skipping (ESS) using spatial partitioning, which accelerate ray casting by culling ray-surface intersection tests in empty parts of the volume, do not align well with GPU architectures. ...

11 published by ACM
October 2011 SAICSIT '11: Proceedings of the South African Institute of Computer Scientists and Information Technologists Conference on Knowledge, Innovation and Leadership in a Diverse, Multidisciplinary Environment
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 1,   Downloads (12 Months): 16,   Downloads (Overall): 368

Full text available: PDFPDF
Terrain constitutes an important part of many virtual environments. In computer games or simulations it is often useful to allow the user to modify the terrain since this can help to foster immersion. Unfortunately, real-time deformation schemes can be expensive and most game engines simply substitute proxy geometry or use ...
Keywords: geometry tessellation, parallax mapping, terrain deformation, OpenGL, caching

12 published by ACM
October 2010 SAICSIT '10: Proceedings of the 2010 Annual Research Conference of the South African Institute of Computer Scientists and Information Technologists
Publisher: ACM
Bibliometrics:
Citation Count: 1
Downloads (6 Weeks): 5,   Downloads (12 Months): 21,   Downloads (Overall): 246

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Monitoring systems are necessary for the management of anything beyond the smallest networks of computers. While specialised monitoring systems can be deployed to detect specific problems, more general systems are required to detect unexpected issues, and track performance trends. While large fleets of computers are becoming more common, few existing, ...
Keywords: visualisation, scalability, monitoring system

13
February 2010 Computational Biology and Chemistry: Volume 34 Issue 1, February, 2010
Publisher: Elsevier Science Publishers B. V.
Bibliometrics:
Citation Count: 0

In this work, a model for the interaction between CYP2B4 and the FMN domain of rat P450-oxidoreductase is built using as template the structure of a bacterial redox complex. Amino acid residues identified in the literature as cytochrome P450 (CYP)-redox partner interfacial residues map to the interface in our model. ...
Keywords: Computational modelling, CYP, Cytochrome P450 reductase, Protein-protein interfaces, Cytochrome P450, Ionic interactions, P450-oxidoreductase, POR, BM3, FMN

14 published by ACM
February 2009 I3D '09: Proceedings of the 2009 symposium on Interactive 3D graphics and games
Publisher: ACM
Bibliometrics:
Citation Count: 41
Downloads (6 Weeks): 14,   Downloads (12 Months): 73,   Downloads (Overall): 1,454

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Procedural methods for terrain synthesis are capable of creating realistic depictions of heightfield terrains with little user intervention. However, users often do wish to intervene in controlling the placement and shape of landforms, but without sacrificing realism. In this paper, we present a sketching interface to procedural terrain generation. This ...

15 published by ACM
February 2009 AFRIGRAPH '09: Proceedings of the 6th International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa
Publisher: ACM
Bibliometrics:
Citation Count: 1
Downloads (6 Weeks): 2,   Downloads (12 Months): 8,   Downloads (Overall): 217

Full text available: PDFPDF
This paper investigates the digital reconstruction of destroyed buildings from small sets of old, uncalibrated photographs. The application domain is the heritage preservation of District Six -- a mixed race area in Cape Town that was leveled during the South African Apartheid regime and whose residents were forcibly removed. Our ...
Keywords: photogrammetric reconstruction, texture synthesis, heritage preservation

16 published by ACM
February 2009 AFRIGRAPH '09: Proceedings of the 6th International Conference on Computer Graphics, Virtual Reality, Visualisation and Interaction in Africa
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 2,   Downloads (12 Months): 12,   Downloads (Overall): 246

Full text available: PDFPDF
Traditionally, levels of detail (LOD) for animated characters are computed from a single pose. Later techniques refined this approach by considering a set of sample poses and evaluating a more representative error metric. A recent approach to the character animation problem, animation space , provides a framework for measuring error ...
Keywords: simplification, character animation

17 published by ACM
August 2008 Sandbox '08: Proceedings of the 2008 ACM SIGGRAPH symposium on Video games
Publisher: ACM
Bibliometrics:
Citation Count: 1
Downloads (6 Weeks): 0,   Downloads (12 Months): 9,   Downloads (Overall): 254

Full text available: PDFPDF
We describe a framework for providing game agents with awareness of the intrinsic spatial qualities of the virtual worlds that they inhabit. We develop a novel data structure based on a modified medial axis, which establishes a mapping between the medial axis and world structures. This data structure can be ...
Keywords: agents, spatial analysis, games

18 published by ACM
October 2006 ACM Transactions on Graphics (TOG): Volume 25 Issue 4, October 2006
Publisher: ACM
Bibliometrics:
Citation Count: 26
Downloads (6 Weeks): 8,   Downloads (12 Months): 79,   Downloads (Overall): 1,356

Full text available: PDFPDF
Skeletal subspace deformation (SSD), a simple method of character animation used in many applications, has several shortcomings; the best-known being that joints tend to collapse when bent. We present animation space , a generalization of SSD that greatly reduces these effects and effectively eliminates them for joints that do not ...
Keywords: Character animation, parametrization, skinning

19 published by ACM
July 2006 SIGGRAPH '06: ACM SIGGRAPH 2006 Sketches
Publisher: ACM
Bibliometrics:
Citation Count: 2
Downloads (6 Weeks): 0,   Downloads (12 Months): 6,   Downloads (Overall): 116

Full text available: PDFPDF

20 published by ACM
January 2006 AFRIGRAPH '06: Proceedings of the 4th international conference on Computer graphics, virtual reality, visualisation and interaction in Africa
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 0,   Downloads (12 Months): 11,   Downloads (Overall): 345

Full text available: PDFPDF
We present a framework for the rapid detection and 3D localisation of bullets (or other compact shapes) from a sparse set of cross-sectional patient x-rays. The intention of this work is to assess a software architecture for an application specific alternative to conventional CT which can be leveraged in poor ...
Keywords: bullets, reconstruction, segmentation, medical imaging



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