How to measure display gamma?
There are several means to do so. I report here two means used in TV by Alan Roberts and Richard Salmon. You can use two processes to measure gamma, one is quick and dirty, the other is slow and uses some tricky maths to get rid of offsets in both the linear (light) and non-linear (volts) domains. Both methods are standard within the TV industry now, having been adopted by the EBU (European Braodcasting Union) recently following our developement work in this area.
