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 William Bill Cowan

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Average citations per article4.19
Citation Count113
Publication count27
Publication years1983-2014
Available for download20
Average downloads per article732.70
Downloads (cumulative)14,654
Downloads (12 Months)335
Downloads (6 Weeks)51
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27 results found Export Results: bibtexendnoteacmrefcsv

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1 published by ACM
August 2014 CAe '14: Proceedings of the Workshop on Computational Aesthetics
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 1,   Downloads (12 Months): 9,   Downloads (Overall): 112

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What makes images of water look like water? We conducted four psychophysical experiments to isolate perceptual qualities that make water easy to recognize. Water recognition is facilitated by colour and by three patterns of waves. Low spatial frequencies (LSF) (<4.4 cpd) contribute more to recognition than high spatial frequencies (HSF). ...
Keywords: non-photorealistic rendering, object recognition, perception, spatial frequency scales, water simulation

2 published by ACM
August 2013 SAP '13: Proceedings of the ACM Symposium on Applied Perception
Publisher: ACM
Bibliometrics:
Citation Count: 1
Downloads (6 Weeks): 0,   Downloads (12 Months): 1,   Downloads (Overall): 38

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Water is fluid and changeable, its colour and shape are determined by its environment. For example, deep and shallow water require very different physical simulations [Darles et al. 2011]. Yet humans effortlessly discriminate between water and non-water: there must be simple and unique perceptual features making discrimination possible. We are ...

3 published by ACM
April 2009 CHI '09: Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Publisher: ACM
Bibliometrics:
Citation Count: 5
Downloads (6 Weeks): 4,   Downloads (12 Months): 19,   Downloads (Overall): 686

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This study examines methods for displaying distance information to blind travellers using sound, focussing on abstractions of methods currently used in commercial Electronic Travel Aids (ETAs). Ten blind participants assessed three sound encodings commonly used to convey distance information by ETAs: sound frequency (Pitch), Ecological Distance (ED), and temporal variation ...
Keywords: assistive technology, blind users, distance perception, evaluation, guidelines, sound visualization

4 published by ACM
August 2008 APGV '08: Proceedings of the 5th symposium on Applied perception in graphics and visualization
Publisher: ACM
Bibliometrics:
Citation Count: 2
Downloads (6 Weeks): 0,   Downloads (12 Months): 2,   Downloads (Overall): 224

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Data selection is an integral part of information visualization. It almost universally incorporates Boolean logic in some way, despite the known difficulties of Boolean concepts for users. As a result many different visual interfaces have been proposed for specifying or displaying Boolean queries. In general they are tested experimentally, and ...
Keywords: boolean query, visual query, stimulus onset asynchrony, evaluation, visualization

5
May 2008 GI '08: Proceedings of Graphics Interface 2008
Publisher: Canadian Information Processing Society
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 0,   Downloads (12 Months): 1,   Downloads (Overall): 250

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This paper describes a new algorithm for geometric displacement mapping. Its key idea is that all occluded solutions for an eye ray lie in two-dimensional manifolds perpendicular to the underlying surface to which the height map is applied. The manifold depends only on the eye position and surface geometry, and ...

6 published by ACM
July 2007 APGV '07: Proceedings of the 4th symposium on Applied perception in graphics and visualization
Publisher: ACM
Bibliometrics:
Citation Count: 1
Downloads (6 Weeks): 0,   Downloads (12 Months): 2,   Downloads (Overall): 197

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This paper describes an experiment investigating for the first time, the perceptual tolerance of inconsistent projections when rotated billboards are transformed and included in an image among other objects produced by traditional 3D computer graphics. The need for this results has arisen in building a system to assist artists with ...
Keywords: geometric transformation, perception, billboard, projection, psychophysics, rotation, silhouette

7 published by ACM
July 2006 SIGGRAPH '06: ACM SIGGRAPH 2006 Research posters
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 0,   Downloads (12 Months): 1,   Downloads (Overall): 96

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8 published by ACM
July 2006 APGV '06: Proceedings of the 3rd symposium on Applied perception in graphics and visualization
Publisher: ACM
Bibliometrics:
Citation Count: 2
Downloads (6 Weeks): 0,   Downloads (12 Months): 1,   Downloads (Overall): 169

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Research in computer graphics noticed deviations from strict geometrical perspective in Renaissance painting, which it treated as exceptional cases, related to specific human perceptions. Based on research in perceptual grouping and art history, this work argues that the deviations are not exceptional but systematic. A new graphics architecture supporting multiple ...

9
June 2006 GI '06: Proceedings of Graphics Interface 2006
Publisher: Canadian Information Processing Society
Bibliometrics:
Citation Count: 6
Downloads (6 Weeks): 1,   Downloads (12 Months): 6,   Downloads (Overall): 369

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Pen/Stylus input systems are constrained by the limited input capacity of the electronic stylus. Stylus modes, which allow multiple interpretations of the same input, lift capacity limits, but confront the user with possible cognitive and motor costs associated with switching modes. This paper examines the costs of bimanual mode switching, ...
Keywords: asymmetric, bimanual, kinematic chain, mode, pen, stylus, symmetric

10 published by ACM
June 2006 ACM SIGecom Exchanges: Volume 6 Issue 1, June 2006
Publisher: ACM
Bibliometrics:
Citation Count: 3
Downloads (6 Weeks): 1,   Downloads (12 Months): 2,   Downloads (Overall): 335

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The exchange of digital goods via peer-to-peer (P2P) systems is a challenging problem for e-commerce. Participants rarely know each other, and may be completely anonymous, so the self-interest of the participants works against trust and they miss out on the benefits of cooperation. Reputation mechanisms help to remedy selfish misbehaviour. ...
Keywords: collaboration, reputation mechanism, incentives, peer-to-peer

11
October 2003 VIS '03: Proceedings of the 14th IEEE Visualization 2003 (VIS'03)
Publisher: IEEE Computer Society
Bibliometrics:
Citation Count: 1
Downloads (6 Weeks): 0,   Downloads (12 Months): 0,   Downloads (Overall): 167

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12 published by ACM
November 1999 NPIVM '99: Proceedings of the 1999 workshop on new paradigms in information visualization and manipulation in conjunction with the eighth ACM internation conference on Information and knowledge management
Publisher: ACM
Bibliometrics:
Citation Count: 0
Downloads (6 Weeks): 2,   Downloads (12 Months): 2,   Downloads (Overall): 188

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The ever-increasing presence of hypertext as a mechanism for browsing information has necessitated study of how to counter usability difficulties inherent to hypertext as a medium. The conjunction of semantically typed links with associated visual behaviours are proposed, as a means to amending typical navigation problems. Types provide structure to ...
Keywords: information visualization, link behaviour, link role

13
August 1998 GD '98: Proceedings of the 6th International Symposium on Graph Drawing
Publisher: Springer-Verlag
Bibliometrics:
Citation Count: 6

Combinatorial graphs are increasingly used for information presentation. They provide high information density and intuitive display of multiple relationships, while offering low cost because they can be created algorithmically. Essential to algorithmic graph layout is a set of rules that encode layout objectives. How these rules are related to inferences ...

14 published by ACM
October 1992 ACM Transactions on Graphics (TOG): Volume 11 Issue 4, Oct. 1992
Publisher: ACM
Bibliometrics:
Citation Count: 5
Downloads (6 Weeks): 2,   Downloads (12 Months): 17,   Downloads (Overall): 711

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Luminance contrast is the basis of text legibility, and maintaining luminance contrast is essential for any color selection algorithm. In principle, it can be calculated precisely on a sufficiently well-calibrated display surface, but calibration is very expensive. Consequently, most current systems deal with contrast using heuristics. However, the usual CRT ...

15 published by ACM
March 1992 SAC '92: Proceedings of the 1992 ACM/SIGAPP symposium on Applied computing: technological challenges of the 1990's
Publisher: ACM
Bibliometrics:
Citation Count: 1
Downloads (6 Weeks): 1,   Downloads (12 Months): 1,   Downloads (Overall): 214

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16
August 1990 INTERACT '90: Proceedings of the IFIP TC13 Third Interational Conference on Human-Computer Interaction
Publisher: North-Holland Publishing Co.
Bibliometrics:
Citation Count: 2


17
June 1990 Proceedings on Graphics interface '90
Publisher: Canadian Information Processing Society
Bibliometrics:
Citation Count: 1


18
June 1990 Proceedings on Graphics interface '90
Publisher: Canadian Information Processing Society
Bibliometrics:
Citation Count: 0


19 published by ACM
April 1990 ACM Transactions on Graphics (TOG): Volume 9 Issue 2, April 1990
Publisher: ACM
Bibliometrics:
Citation Count: 2
Downloads (6 Weeks): 3,   Downloads (12 Months): 13,   Downloads (Overall): 696

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Background: The gamut of a color CRT is defined by its three primary colors, each produced by a phosphor/electron gun combination. Light from the primaries combines additively, so the color gamut is a subset of a three dimensional vector space [1]. With the primaries as basis vectors normalized to 1.0, ...

20
December 1989 Proceedings on Graphics interface '88
Publisher: Canadian Information Processing Society
Bibliometrics:
Citation Count: 0




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