Color Space

Creator
Creator
Seonglae ChoSeonglae Cho
Created
Created
2021 Apr 21 4:34
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Edited
Edited
2025 Jul 13 12:24
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Refs
When representing a Color Space as a cone, hue is the rotation, saturation is the radius, and brightness is the height axis.
The human eye is more sensitive to luminance components than color components. This means that if the contrast is matched correctly, people will hardly notice if colors are slightly faded. That's why subsampling is often used to compress by reducing the color difference information (Cb, Cr) while preserving the brightness information (Y) that humans are more sensitive to. Colors with 24 bits or more are called true colors.
Wavelength 가 prism 에 not fully separated, artists call this warm and cool colours. When we open the Parenthesis,
Color Spaces Notion
 
 
 
Color Spaces
notion image
 
 
 
 
  • Isaac Newton’s circle, 1704 (approximation)
  • Otto Runge’s sphere, 1810
  • Jame Clerk Maxwell’s triangle, 1855
  • Herman von Helmholtz diagram, 1867 (approximation)
  • William Benson’s cube, 1868
  • August Kirschmann’s double cone, 1895
  • Erwin Schrodinger’s non-Euclidean space, 1920
  • David MacAdam’s Coptimal solid (CIE XYZ), 1935
    • This object theoretically contains all colours that can be observed up to a certain luminosity.
  • CIELAB, 1976
  • sRGB, 1996
    • Depending on the intensity of these three lights, the screen can synthesize colours within a triangle, or a cube, in three dimensions.
    • These colours are enough for most images, but we do miss some very vivid ones, such as those we see during a
      Sunset
      .
  • CIECAM97s, 1997
  • CIECAM01, 2002
  • iCAM06, 2006
  • SRLAB2, 2009
  • CIECAM, 2016
The "Geometry" of Colours, from Newton to Schrödinger...
What are colours? Do they form a particular geometry? Can we build this geometry from our perceptions? All the answers in 20 minutes! 0:00 - Introduction 1:07 - What is a colour? 2:03 - Newton's disc 6:02 - The XYZ space 8:49 - Screens and vision 12:09 - Psychological approach 17:07 - Conclusion Link to the game mentioned at 13:00: http://colors2.alessandroroussel.com/ _________________________________________________ This video is narrated by Octave Masson. For more videos, subscribe to the YouTube channel : https://www.youtube.com/ScienceClicEN And if you liked this video, you can share it on social networks ! To support me on Patreon : http://www.patreon.com/ScienceClic or on Tipeee : http://tipeee.com/ScienceClic Facebook page : http://facebook.com/ScienceClic Instagram : http://instagram.com/ScienceClic Alessandro Roussel, For more info: http://www.alessandroroussel.com/en _________________________________________________ ScienceClic Français : http://youtube.com/ScienceClic ScienceClic Español : http://youtube.com/ScienceClicES _________________________________________________ Sources and bibliography: https://www.researchgate.net/publication/367216474_Helmholtz_and_the_geometry_of_color_space_gestation_and_development_of_Helmholtz's_line_element https://www.researchgate.net/publication/377372066_Helmholtz_Schrodinger_and_the_First_Non-Euclidean_Model_of_Perceptual_Color_Space https://link.springer.com/content/pdf/10.1007/s00407-023-00317-x.pdf https://www.gutenberg.org/files/33504/33504-h/33504-h.htm http://www.gutenberg-e.org/lowengard/A_Chap03.html https://royalsocietypublishing.org/doi/epdf/10.1098/rstl.1802.0004 https://pubmed.ncbi.nlm.nih.gov/17026602/ https://www.eizo.com.cn/global/library/EIZO_DCH_APPENDIXA.pdf https://www.jcgt.org/published/0014/01/01/paper.pdf http://www.color-theory-phenomena.nl/08.00.html https://rmit.pressbooks.pub/colourtheory1/chapter/modern-era-c-1850-to-1980/ https://pteromys.melonisland.net/munsell/ https://www.webexhibits.org/colorart/ganglion.html https://www.icst.pku.edu.cn/mipl/docs/F8A22B42-BDB9-137E-C51F5F9B422FE985_49512.pdf https://www.pnas.org/doi/full/10.1073/pnas.2119753119 https://www.science.org/doi/10.1126/sciadv.adu1052
The "Geometry" of Colours, from Newton to Schrödinger...
 

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