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Articles 1 - 9 of 9
Full-Text Articles in Physical Sciences and Mathematics
On The Optimization Of Visualizations Of Complex Phenomena, Donald H. House, Althea D. Bair, Colin Ware
On The Optimization Of Visualizations Of Complex Phenomena, Donald H. House, Althea D. Bair, Colin Ware
Center for Coastal and Ocean Mapping
The problem of perceptually optimizing complex visualizations is a difficult one, involving perceptual as well as aesthetic issues. In our experience, controlled experiments are quite limited in their ability to uncover interrelationships among visualization parameters, and thus may not be the most useful way to develop rules-of-thumb or theory to guide the production of high-quality visualizations. In this paper, we propose a new experimental approach to optimizing visualization quality that integrates some of the strong points of controlled experiments with methods more suited to investigating complex highly-coupled phenomena. We use human-in-the-loop experiments to search through visualization parameter space, generating large …
View Direction, Surface Orientation And Texture Orientation For Perception Of Surface Shape, Colin Ware, Graeme Sweet
View Direction, Surface Orientation And Texture Orientation For Perception Of Surface Shape, Colin Ware, Graeme Sweet
Center for Coastal and Ocean Mapping
Textures are commonly used to enhance the representation of shape in non-photorealistic rendering applications such as medical drawings. Textures that have elongated linear elements appear to be superior to random textures in that they can, by the way they conform to the surface, reveal the surface shape. We observe that shape following hache marks commonly used in cartography and copper-plate illustration are locally similar to the effect of the lines that can be generated by the intersection of a set of parallel planes with a surface. We use this as a basis for investigating the relationships between view direction, texture …
A Method For The Perceptual Optimization Of Complex Visualizations, Donald H. House, Colin Ware
A Method For The Perceptual Optimization Of Complex Visualizations, Donald H. House, Colin Ware
Center for Coastal and Ocean Mapping
A common problem in visualization applications is the display of one surface overlying another. Unfortunately, it is extremely difficult to do this clearly and effectively. Stereoscopic viewing can help, but in order for us to be able to see both surfaces simultaneously, they must be textured, and the top surface must be made partially transparent. There is also abundant evidence that all textures are not equal in helping to reveal surface shape, but there are no general guidelines describing the best set of textures to be used in this way. What makes the problem difficult to perceptually optimize is that …
Layout For Visualizing Large Software Structures In 3d, Colin Ware, Glenn Franck, Monica Parkhi, Tim Dudley
Layout For Visualizing Large Software Structures In 3d, Colin Ware, Glenn Franck, Monica Parkhi, Tim Dudley
Center for Coastal and Ocean Mapping
There is increasing evidence that 3D visualization of complex structures has advantages over 2D visualization. While nested directed graphs are an important method of representing information in 2D or 3D, they must be effectively organized in order to be understood. Most work on graph layout has assumed that fully automatic layout is desirable. Through our work with graphs representing large software structures, we have found that, due to the importance of the semantic content, it is necessary to combine automatic layout with manual layout. This paper describes a system called GraphVisualizer3D, which was designed to help people understand large nested …
Viewing A Graph In A Virtual Reality Display Is Three Times As Good As A 2d Diagram, Colin Ware, Glenn Franck
Viewing A Graph In A Virtual Reality Display Is Three Times As Good As A 2d Diagram, Colin Ware, Glenn Franck
Center for Coastal and Ocean Mapping
An experiment is reported which tests whether network information is more effectively displayed in a three dimensional space than in a two dimensional space. The experimental task is to trace a path in a network and the experiment is carried out in 2D, in a 3D stereo view, in a 2D view with head coupled perspective, and in a 3D stereo view with head coupled perspective; this last condition creates a localized virtual reality display. The results show that the motion parallax obtained from the head coupling of perspective is more important than stereopsis in revealing structural information. Overall the …
Representing Nodes And Arcs In 3d Networks, Glenn Franck, Colin Ware
Representing Nodes And Arcs In 3d Networks, Glenn Franck, Colin Ware
Center for Coastal and Ocean Mapping
This paper introduces six graphical principles for 30 network displays. These are justified with examples from GraphVisualizer3D, a system developed by the authors to investigate the problems of 30 visualization of information networks. GraphVisualizer3D enables the exploration of sulface color, surface texture, object shape, arc shape and labeling conventions.
Visualizing Object Oriented Software In Three Dimensions, Colin Ware, David Hui, Glenn Franck
Visualizing Object Oriented Software In Three Dimensions, Colin Ware, David Hui, Glenn Franck
Center for Coastal and Ocean Mapping
There is increasing evidence that it is possible to perceive and understand increasingly comple x information systems if they are displayed a s graphical objects in a three dimensional space . Object-oriented software provides an interestin g test case - there is a natural mapping fro m software objects to visual objects . In this paper we explore two areas. 1) Information perception : we are running controlled experiments to determine empirically if our initial premise is valid; how much more (or less) can be understoo d in 3D than in 2D? 2) Layout: our strategy is to combine partially …
Strokes For Representing Univariate Vector Field Maps, David Fowler, Colin Ware
Strokes For Representing Univariate Vector Field Maps, David Fowler, Colin Ware
Center for Coastal and Ocean Mapping
Particle systems make an excellent tool for creating tracks (which we call strokes) in vector fields. The question addressed in this paper is how such tracks should be made to vary in size and colour in order to reveal properties such as local direction and strength of the field. We find that for strokes that vary from large to small, direction is indicated by the large end. We also find that for strokes that vary in colour, the colour of the background is the most important determinant of perceived direction.
Escim: A System For The Investigation Of Meaningful Motion, Siew Hong Yang, Colin Ware
Escim: A System For The Investigation Of Meaningful Motion, Siew Hong Yang, Colin Ware
Center for Coastal and Ocean Mapping
A language is described whose purpose is the investigation of meaningful motion using Stimulus Response animation techniques. The language is capable of adjusting the shape, size and velocity of an actor in real-time computer animation. Some results are presented showing how it is possible to generate such behaviours as chasing, avoidance and hitting using this animation technique. A set of primitives are presented which we find invaluable in the control of size, stretch and velocity parameters when attempting to produce fluid and meaningful interactions.