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Exploring Color Principles: A Comprehensive Guide from Physics to Artistic Perspectives

Dive into the fascinating world of color with this comprehensive guide. Discover how color is perceived from various viewpoints, including physics, physiology, and artistry. Explore essential concepts such as hue, saturation, value, and their applications in paint and ink mixing. Understand the RGB and CMY color models, and learn about CIE color matching functions and perceptually uniform spaces. This resource is perfect for artists, designers, and anyone interested in mastering the principles of color theory and application.

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Exploring Color Principles: A Comprehensive Guide from Physics to Artistic Perspectives

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  1. Donald House Artist’s slides by Lynette House Computer Graphics SystemsColor principles

  2. Color from Physics Viewpoint

  3. Color from Physiological Viewpoint 3 cone response curves Luminance efficiency

  4. Color from Artist’s Viewpoint • Hue • Saturation • Value

  5. Hue - Paint Mixing • Physical mix of opaque paints • Primary: RYB • Secondary: GOV • Neutral: R + Y + B

  6. Hue - Ink Mixing • Subtractive mix of transparent inks • Primary: CMY • Secondary: RGB • ~Black: C + M + Y • Actually use CMYKto get true black

  7. Hue - Ink Mixing Assumption: ink printed on pure white paper CMY = White – RGB: C = 1 – R, M = 1 – G, Y = 1 – B CMYK from CMY: K = min(C, M, Y) C = C – K, M = M – K, Y = Y - K

  8. Hue - Light Mixing • Additive mix of colored lights • Primary - RGB • Secondary - CMY • White - R + G + B • Show demonstration of optical mixing

  9. Saturation • Purity of color

  10. Value • Luminance • Dark to Light • Value range • High key • Middle key • Low key

  11. RGB Color Wheel • Warm/Cool • Complements • Split Complement • Analogous

  12. HSV Color Model HSV is a projection of the RGB space RGB cube HSV top view HSV cone

  13. HSV Color Model Hue, an angular measure (0 - 360)‏

  14. HSV Color Model Saturation, a fractional measure (0 - 1)‏

  15. HSV Color Model Value, a fractional measure (0 - 1)‏

  16. CIE 1931 Study Color Matching Experiment

  17. CIE Color Matching Functions CIE RGB Matching Functions CIE XYZ Matching Functions

  18. RGB from Spectrum RGB = x d

  19. XYZ from Spectrum XYZ = x d

  20. CIE xyY from CIE XYZ • CIE xyY color model is used to catalog colors: • x = X / (X + Y + Z)‏ • y = Y / (X + Y + Z)‏ • Y = luminance

  21. CIE xyY Color Cone

  22. CIE xyY Typical Display Gamut

  23. CIE Lu*v* and Lab Perceptually Uniform Spaces Lu*v* rescales xyYLab color opponents

  24. Color Picker

  25. End

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