This document discusses color modeling and color perception. It presents several color diagrams created by scientists and designers to show different color models. These include diagrams for the chromaticities of color filters, the sRGB color space, and printer gamuts. The document also discusses Johannes Itten's color wheel and examines measuring color and validating crowd-sourced color naming. Overall, the document examines scientific, perceptual, and applied aspects of representing and identifying color.

1. Is it turquoise + fuchsia = purple
or is it
turquoise + fuchsia = blue?
Giordano B. Beretta, Nathan M. Moroney
Printing & Content Delivery Lab
Hewlett-Packard Laboratories
Palo Alto, California
Color Imaging XVI:
Displaying, Processing, Hardcopy, and Applications
San Francisco Airport, 24 – 27 January 2011
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 1 / 16

2. Color diagrams by scientists
Fig. 2−1: Chromaticities of the six filters
Green 203−3E
Green 206−3E
Red 304M−3E
0.5
0.4
0.3
v’
0.2
Blue 111−3E
0.1
0
0 0.1 0.2 0.3 0.4 0.5 0.6
u’
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 2 / 16

3. Color diagrams by designers
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 3 / 16

4. sRGB color diagram
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 4 / 16

5. It is 3-dimensional!
Assuming we are viewing on an sRGB display
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 5 / 16

6. Printer gamut
Assuming we are viewing on an sRGB display resp. print
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 6 / 16

7. Color theories — an abstraction
Leonardo da Vinci vs. Johannes Itten
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 7 / 16

8. Itten revealed
Gelb
Gelborange
Gelbgrün
Grün Orange
Blau- Rot-
grün orange
Blau Rot
Rotviolett
Blauviolett
Violett
It is lexical!
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 8 / 16

9. Color by measurement
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 9 / 16

10. Naming color
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 10 / 16

11. Validating crowd-sourcing
The calibrated lunch. Instructions:
Please take a colored patch from one of the volunteers before
getting your food
The game consists of sitting at the table with color name closest to
your colored chip
If you have any difficulties with selecting a table please ask for
help from anyone
The table with closest agreement or smallest difference between
their color patches will win a prize
One member of the winning table will then be eligible to win the
grand prize
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 11 / 16

12. Color chips given and color seating arrangement
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 12 / 16

13. Calibrated lunch vs. Web color centroids
CIECAM02 hue angles for 25 non-basic color terms:
360
y = 1.01x – 4.57
R 2 = 0.99
270
Calibrated Lunch
180
90
0
0 90 180 270 360
Uncalibrated Web
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 13 / 16

14. Beyond crowd sourcing
English corpus 1800 − 2000, smoothing of 3
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 14 / 16

15. What is the best term for RGB = (0, 1, 1)?
English corpus 1800 − 2000, smoothing of 3
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 15 / 16

16. Is the term for RGB = (1, 1, 0) monolexemic?
English corpus 1800 − 2000, smoothing of 3
Beretta & Moroney (HP Labs) Session 5: Vision EI 2011 paper 7866-16 16 / 16