[onikolas]

That's why even the good old 8 bits per channel images are encoded logarithmically. Enter the gamma curve: https://en.wikipedia.org/wiki/Gamma_correction

[Taniwha]

no - the REASON why we use gamma is deeply historical and has essentially to do with trying to build TV receivers with the minimum number of vacuum tubes

[mark-r]

Is it just a coincidence that the gamma curve also corresponds roughly to our eyes response to light? Awfully lucky if it was.