sRGB Companding

\(\text{compand}(x) = \begin{cases} 12.92x&\text{if }x \le 0.0031308\\ 1.055x^{1/2.4}-0.055&\text{else} \end{cases}\)

Inverse sRGB Companding

\(\text{inv_compand}(x) = \begin{cases} \dfrac{x}{12.92}&\text{if }x \le 0.04045\\ \left(\dfrac{x+0.055}{1.055}\right)^{2.4}&\text{else} \end{cases}\)