Saturation & Value

  • Due Dec 8, 2016 at 8:59am
  • Points 2
  • Questions 2
  • Available until Dec 8, 2016 at 8:59am
  • Time Limit None
  • Allowed Attempts Unlimited

Instructions

Watch the following video tutorial:
http://youtu.be/9Gwi5VExGZM

[PDF of Slides]

Summary:

• Saturation measures the amount of white light in a color’s spectrum (pink is de-saturated red).
• Value indicates the total amount of light, with white as the highest value & black the lowest.
• Saturation and value vary with lighting.
• Black, white, and gray are all the same hue and saturation (zero) but have different value.
• In dim light we see with rod cells, which do not distinguish hue or saturation, only value.
• Rods have a greater sensitivity to the blue side of the spectrum than cones (Purkinje shift).

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