Greyscale Transformation

Negative transformation

Below is an example of negative transformation (invert color), i.e. $T\left(x\right)=1-x$ where $x\in [0,1]$.

Logarithmic transformation

Below is an example of logarithmic transformation. It uses $T\left(x\right)=c{\log }_2(1+x)$ where $c$ is the value of slider below and $x\in [0,1]$.

k = 1

Power-law transformation

Below is an example of power-law (gamma) transformation. It uses $T\left(x\right)=x^k$ where $k$ is the value of slider below and $x\in [0,1]$.

k = 1

Image used: "Aoi Aso-jinja, torii" by Saigen Jiro (CC0 1.0)