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Raquel Bujans DKL Color Model Research advisor Dr. Cindy Grimm.

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Presentation on theme: "Raquel Bujans DKL Color Model Research advisor Dr. Cindy Grimm."— Presentation transcript:

1 Raquel Bujans DKL Color Model Research advisor Dr. Cindy Grimm

2 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 2 Color Theory How your eye sees light: Light reflects off object Enters eye, retina Processed by brain Physical process: Rods Cones Double-opponent cells

3 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 3 Color Theory

4 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 4 Color Theory

5 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 5 Cones Daylight See color 3 types: red, green, blue (not exact) Middle of retina

6 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 6 Rods Low light conditions Black + white Peripheral vision More rods than cones

7 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 7 Double-Opponent Circular Types Red – green Blue – yellow Make both colors seem brighter when next to each other (hard time seeing boundary)

8 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 8 Double-Opponent Blue-Yellow:

9 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 9 Double-Opponent Red- Green:

10 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 10 Blind spot! No rods / cones / double-opponent cells in one spot. That where your optic nerve is!

11 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 11 Fun Tricks http://www.psych.ucsb.edu/~rowe/Simultane ousContrast.html http://www.psych.ucsb.edu/~rowe/Successiv eColorContrast.html

12 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 12 Existing Color Models (RGB) RGB: red, green, blue Additive (all 3 together = white light) Based on additive primary colors Can’t represent all visible colors TV, monitors

13 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 13 Existing Color Models (HSV) HSV: hue, value, saturation Hue means “color” Value means “brightness” Saturation means “vibrancy” or “purity” More perceptually intuitive

14 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 14 Existing Color Models (HSV)

15 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 15 Existing Color Models (LUV) LUV: luminance, chromacity Tries to represent more colors than RGB Can represent all visible colors Designed to be more accurate

16 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 16 Existing Color Models (LUV)

17 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 17 New Model - DKL DKL: red-green, blue-yellow, intensity Reasons why: New methods for artistic control Based directly off eye’s physical process of “seeing”

18 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 18 Why DKL is Better Paint more warm/cool Ex: paint sunrise  sunset Each color shifts differently Ex: red  blue VS. green  blue Easy to change: adjust blue-yellow channel Control intensity Intensity affects color http://www.psych.ucsb.edu/~rowe/Bezold-Brucke.html

19 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 19 Why DKL is Better In touch with the way we see light Models behavior of cones, rods, and double opponents Represents more colors Color interaction more correct

20 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 20 Color Shift Tables Recent work: tables of colors shifted under different color models

21 Raquel Bujans rb3@cec.wustl.edu Washington University in St. Louis Media & Machines Lab 21 Questions? ?

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