Inversions of image colour components.

https://github.com/janvancoppenolle/LUT/tree/main/Inverters

Channel Inversion

Channel Inversion
Input Result

Inverts the image by inverting the channel values.

\[f(x) = 1-x\]

White becomes black and vice versa. Hues are rotated 180° – red becomes cyan, green becomes magenta and blue becomes yellow.

Hue Inversion

Hue Inversion
Input Result

Point reflection / rotation of the colour wheel without inversion of the Lightness.

Lightness Inversion

Lightness Inversion
Input Result

This inverts the image but keeps the hue.

It combines both operations of Channel Inversion and Hue Inversion in order to avoid the rotation of the colour wheel.