http://www.normankoren.com/makingfineprints1A.html#Gammabox

https://en.wikipedia.org/wiki/Gamma_correction

http://www.photoscientia.co.uk/Gamma.htm

https://www.w3.org/Graphics/Color/sRGB.html

http://www.eizoglobal.com/library/basics/lcd_display_gamma/index.html

https://forum.reallusion.com/PrintTopic308094.aspx

Basically, gamma is the relationship between the brightness of a pixel as it appears on the screen, and the numerical value of that pixel. Generally Gamma is just about defining relationships.

Three main types:
– Image Gamma encoded in images
– Display Gammas encoded in hardware and/or viewing time
– System or Viewing Gamma which is the net effect of all gammas when you look back at a final image. In theory this should flatten back to 1.0 gamma.