A collection of 1D LUTs in CUBE and Photoshop Arbitrary Map (.amp Curves Preset) format for image shaping.

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

Curve Result

Soft S-Curve

The result is equal to blending the image with itself using the simplified Soft Light blend mode.

\[f(x) = 3x^2-2\sqrt[3]{x}\]
Curve Result

Sigmoid S-Curve

Very strong contrast S-Curve.

\[f(x)={1\over{1+e^{(6-12x)}}}\]
Curve Result

Sharpen Contrast

There used to be a Kai Krause filter for Photoshop part of the KPT bundle with this name. It clips 25% black and 25% white.

\[f(x)={4x-1 \over 2}\]
Curve Result

Cubic

This softens the contrast instead of enhancing it.

\[f(x)=2x^3-3x^2+2x\]
Curve Result

Gamma Correction

\[f(x)=x^{1/\gamma}\]
Curve Result
\[Gamma\ 1.6\ (γ = 0.625)\]