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SciVL: A Descriptive Language for 2D Multivariate Scientific Visualization Synthesis

SciVL is an innovative descriptive language designed for rapid prototyping and optimization of 2D multivariate scientific visualizations. Developed by Jason Sobel under the guidance of Prof. David Laidlaw, SciVL allows users to specify visual properties in a hierarchical manner, enabling the creation of complex visualizations with ease. The language supports various layer types, including icon, colorplane, and streamline layers, facilitating a flexible approach to visualization. By defining abstract values and a simple syntax, SciVL aims to enhance the creativity and efficiency of scientific data representation and exploration.

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SciVL: A Descriptive Language for 2D Multivariate Scientific Visualization Synthesis

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  1. SciVL: A Descriptive Language for 2D Multivariate Scientific Visualization Synthesis presented by Jason Sobel advisor: Prof. David Laidlaw

  2. Road Map • Motivation and Introduction • Implementation • Language Specification • Conclusions and Future Work

  3. Motivations • Good visualizations take time • Decide on “visual elements” • Code and debug • Evaluate and iterate

  4. Motivations (cont.) • “Optimize” visualizations • Find best combinations of visual properties

  5. Our Question • Can we provide a fast and easy way to prototype visualizations that also allows optimization?

  6. Proposed Solution • Define a language that can be used to represent a visualization • Create an instance in a text file • Apply an instance to a dataset to generate an image

  7. Goals • The language should be: • Simple • Expressive • Flexible • Hierarchical • Easily broken in to “genes”

  8. Contributions • Understanding of “key” visual properties • Rapid prototyping system • Foundation for future work

  9. Road Map • Motivation and Introduction • Implementation • Language Specification • Conclusions and Future Work

  10. Layer System • Three types of layers: • Icon • Colorplane • Streamline • Each layer defines some number of visual elements

  11. Rendering • A SciVL file specifies an arbitrary number of layers • They are combined to produce the final image

  12. Values: Specifying “Numbers” • Visual properties are not given number values in the SciVL file • They are given abstract Values, one of: • Constant • Random • Data-driven

  13. Realization • When rendering a layer, we realize a Value to get a number • Use location to map to data

  14. Values Example

  15. Icon Layer • Let’s look at all the properties of an icon layer • The following images were made using a gradient dataset • 0 on the left to 1 on the right

  16. All Forms

  17. Circle Form

  18. Rectangle Form

  19. Triangle Form

  20. Multi-Offset Forms

  21. Compound Forms

  22. Color

  23. Color (Partial Range)

  24. Alpha

  25. Borders

  26. Border Color

  27. Border Alpha & Width

  28. Spacing

  29. Orientation

  30. Texture

  31. Failures

  32. Jitter

  33. Example Icons

  34. Colorplane Layer • Used for “regions” or “washes” of color

  35. Colorplanes

  36. Colorplanes in Use

  37. Streamline Layer • Useful for visualizing vector data like velocity or vorticity

  38. Streamlines Color & Alpha

  39. Streamlines Width & Texture

  40. Streamline Density

  41. Road Map • Motivation and Introduction • Implementation • Language Specification • Conclusions and Future Work

  42. Layer System • The language specifies visual elements layer by layer • The syntax is a simple interface to all the properties described above • Allows specifying a Value for each one

  43. VisEl Layer BEGIN_LAYER VISEL NVISELS 1 BEGIN_VISEL POISSON POINT Constant .5 Constant .5 Constant 0 NFAILS 0 NFORMS 1 BEGIN_FORMSTAGE SHAPE Constant square NOFFSETS 2 OFFSET POINT Constant 0 Constant 0 Constant 0 OFFSET POINT Constant 5 Constant 0 Constant 0 BEGIN_STYLE NCOLORS 1 POINT Variable gradient_x .4 .6 Constant .8 Constant .8 NALPHAS 1 Constant .8 NTEXTURES 0 NORIENTATIONS 1 Random 0 .1 NBORDERS 1 COLOR POINT Variable gradient_y 0 .3 Constant .7 Constant .8 ALPHA Random .8 1 WIDTH Constant 2 NSCALES 0 NDIMENSIONS 1 POINT Variable gradient_y 3 6 Constant 0 Constant 0 END_STYLE END_FORMSTAGE END_VISEL END_LAYER

  44. Demo

  45. Colorplane Layers • Similar syntax • Can control, per vertex: • Failures • Color • Alpha

  46. Streamline Layers • Similar syntax • Can control: • Failures • Vector to follow • Survival • Density • Color/Transparency • Size • Texture

  47. Road Map • Motivation and Introduction • Implementation • Language Specification • Conclusions and Future Work

  48. More Pictures

  49. Success? • Goals were: • Simple • Expressive • Flexible • Hierarchical • Easily broken in to “genes” • Did we accomplish these goals?

  50. Anecdotal Feedback • A “design-expert” professor from RISD • A scientist with radar polarimetry data

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