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COLOR MODELS 
Adri Jovin J.J. 
Assistant Professor 
Department of Information Technology 
Sri Ramakrishna Institute of Tec...
RGB Color Model 
• Based on “tristimulus theory of vision” 
– eyes perceive color through the stimulation of 
three visual...
RGB Color Model (Contd..) 
"Cie Chart with sRGB gamut by spigget" by Spigget - Own work. Licensed 
under Creative Commons ...
YIQ Color Model 
 
R 
 
 
 
R 
G 
0.299 0.587 0.144 
 
 
 
0.299 0.587 0.144 
0.596 0.275 0.321 
 
 
 
Y 
   ...
YIQ Color Model (Contd…) 
CS2401 - COMPUTER GRAPHICS 5 
"YIQ IQ plane" by Tonyle - Own work. Licensed under 
Creative Comm...
CMY Color Model 
• Defined with the primary colors cyan, 
magenta, and yellow 
• Useful for describing color output to har...
CMY Color Model (Contd…) 
CS2401 - COMPUTER GRAPHICS 7
HSV Color Model 
• Color parameters in this model are hue ( H ) , 
saturation( S ) and value( V ) 
• 3D representation is ...
Reference 
• Donald Hearn, Pauline Baker, Computer 
Graphics – C Version, Second Edition, Pearson 
Education, 2004. 
CS240...
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Color models

A overview of Color Models for Undergraduate Students

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Color models

  1. 1. COLOR MODELS Adri Jovin J.J. Assistant Professor Department of Information Technology Sri Ramakrishna Institute of Technology Coimbatore.
  2. 2. RGB Color Model • Based on “tristimulus theory of vision” – eyes perceive color through the stimulation of three visual pigments in the cones of the retina – peak sensitivity at wavelengths of about 630 nm (red), 530 nm (green), and 450 nm (blue) • Represented as a unit cube defined on R, G, B axes • Color Ck = RR + GG + BB CS2401 - COMPUTER GRAPHICS 2
  3. 3. RGB Color Model (Contd..) "Cie Chart with sRGB gamut by spigget" by Spigget - Own work. Licensed under Creative Commons Attribution-Share Alike 3.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:Cie_Chart_with_sRGB_gamut_ by_spigget.png#mediaviewer/File:Cie_Chart_with_sRGB_gamut_by_spig get.png CS2401 - COMPUTER GRAPHICS 3
  4. 4. YIQ Color Model  R    R G 0.299 0.587 0.144    0.299 0.587 0.144 0.596 0.275 0.321    Y         G    0.596 0.275 0.321           • National Television System Committee (NTSC) color model for forming the composite video signal CS2401 - COMPUTER GRAPHICS 4           Y     B I  Q 0.212 0.528 0.311           B I Q 0.212 0.528 0.311
  5. 5. YIQ Color Model (Contd…) CS2401 - COMPUTER GRAPHICS 5 "YIQ IQ plane" by Tonyle - Own work. Licensed under Creative Commons Attribution-Share Alike 3.0 via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:YIQ_IQ_plane.s vg#mediaviewer/File:YIQ_IQ_plane.svg
  6. 6. CMY Color Model • Defined with the primary colors cyan, magenta, and yellow • Useful for describing color output to hard-copy devices CS2401 - COMPUTER GRAPHICS 6
  7. 7. CMY Color Model (Contd…) CS2401 - COMPUTER GRAPHICS 7
  8. 8. HSV Color Model • Color parameters in this model are hue ( H ) , saturation( S ) and value( V ) • 3D representation is derived from RGB Cube. CS2401 - COMPUTER GRAPHICS 8
  9. 9. Reference • Donald Hearn, Pauline Baker, Computer Graphics – C Version, Second Edition, Pearson Education, 2004. CS2401 - COMPUTER GRAPHICS 9

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  • RevathiVenkatesan

    May. 1, 2018

A overview of Color Models for Undergraduate Students

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