Ch 10: Color
嚜澧h 10: Color
Tamara Munzner
Department of Computer Science
University of British Columbia
CPSC 547, Information Visualization
Day 11: 7 Feb 2017
Idiom design choices: Encode
Encode
Arrange
Express
Separate
Color
What?
Why?
Map
from categorical and ordered
attributes
Order
Align
Hue
Saturation
Luminance
Size, Angle, Curvature, ...
How?
Use
Shape
Motion
Direction, Rate, Frequency, ...
2
Challenges of Color
? what is wrong with this picture?
@WTFViz
※visualizations that make no sense§
3
Categorical vs ordered color
[Seriously Colorful: Advanced Color Principles & Practices.
Stone.Tableau Customer Conference 2014.]
4
Decomposing color
? first rule of color: do not talk about color!
每 color is confusing if treated as monolithic
? decompose into three channels
每 ordered can show magnitude
? luminance
? saturation
每 categorical can show identity
Luminance values
Saturation
Hue
? hue
? channels have different properties
每 what they convey directly to perceptual system
每 how much they can convey: how many discriminable bins can we use?
5
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