Gray World

• Gray world is one of the most common (and best) methods of color balancing

• Assume that the average R, G, and B values are all the same

• Scale the image’s R, G, and B values by addition or multiplication

  • Addition can lead to false colors in areas missing color(s), since low digital values will get increased by the same amount as higher values
  • Multiplication can lead to overemphasis of rare colors due to large scaling factor