APPLYING COLOR THEORY TO CREATING A PREFECT STORM ANIMATION

Visualization based on a Hurricane Katrina model run at 2 kilometer grid resolution using the Weather Research Forecast (WRF) model. The animation shows rain isosurfaces, with the purple areas being locations of heaviest rainfall. Dark blue areas are land masses. 1

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HERE, WE HIGHLIGHT 3 TOPICS: • Applying Color Theory to a time series animation of Hurricane Katrina. • Using Adobe’s Kuler tool to analyze an existing Color Scheme. • Working with the Color Brewer tool to build the Tropical Storm Animation Color Scheme.

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FIRST, LET’S USE ADOBE’S KULER TOOL TO ANALYZE THE COLORS IN OUR HURRICANE VISUALIZATION:

Adobe’s Kuler tool allows us to analyze the colors in a JPEG image. We can save the resulting color palettes for future work. See: http://kuler.adobe.com/.

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WITH ADOBE’S KULER TOOL, WE OBTAIN COLOR VALUES AND POSSIBLE COLOR RELATIONSHIPS:

Complementary Analogous

Note: Color Space Parameters

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KEY ELEMENTS OF COLOR MAP DESIGN : • Establish Color Maps based on flow of Animation Sequences rather than Static Image Displays. • ColorBrewer tool helps to Mock-Up Color Maps. • From the Mock-Up develop the Final Color Maps with the visualization & animation tool (VisIt).

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USING THE COLORBREWER TOOL TO DEVELOP COLORMAPS:

Note: Color Vision Deficiency Parameters

The ColorBrewer tool was conceptualized with color schemes by Cynthia A. Brewer with interface designs by Mark Harrower and software development by Andy Woodruff and Davie Heyman, Department of Geography at Pennsylvania State University). See: (http://colorbrewer2.org).

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FRAME FROM ANIMATION SEQUENCE SHOWING COLOR MAPS:

Visualization programming by Steve Chall with Colorization executed by Theresa-Marie Rhyne at RENCI@NCSU. Created in the VisIt open source visualization tool from weather model data based on Hurricane Katrina, see: (http:www.llnl.gov/VisIt).

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A COLOR SCHEME ANALYSIS OF OUR HURRICANE

Using Color Scheme Designer, we see that our hurricane colors form an analogous color scheme of Magenta, Purple and Blue. Our wind vectors, in Orange, from a complementary color scheme to our Blue ocean background.

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SNAPSHOT OF ANIMATION SEQUENCE EVOLVING IN A NON-LINEAR EDITING SYSTEM:

Time series based on Hurricane Katrina model run at a 2 kilometer grid resolution using the Weather Research Forecast (WRF) model. The animation shows rain isosurfaces, with the purple areas being locations of heaviest rainfall. Dark blue areas are land masses.

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NOW, LET’S SEE THE MOVIE : • To make this movie, we added some titles, music, voice over and more. • Due to its level of detail, the animation looks best as an HD Quicktime movie. • The sequence won an OASCR at the annual meeting of the U.S. Department of Energy’s Scientific Discovery through Advanced Computing (SciDAC 2008) conference held in Seattle, Washington (USA) from July 13 – 17, 2008.

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WHERE TO FIND MORE DETAILS: • A 2011 article exploring our approach to colorizing Hurricane Data “Exploring Visualization Theory”, IEEE Computer Graphics and Applications Magazine, Vol. 31, Issue 3, pages 6-7, 2011 (http://www.computer.org/csdl/mags/cg/2011/03/ mcg2011030006.html) • My “recently published” Book Chapter:

(http://theresamarierhyne.com/Theresa-Marie_Rhynes_Viewpoint/ Color_Theory_Book_Chapter.html)

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ACKNOWLEDGEMENTS: • Thanks to many colleagues in visualization & digital media who have helped me learn so very much over many years. • with much gratitude & appreciation... Theresa-Marie Rhyne

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