A blazingly fast interpolated LUT generator and applicator for arbitrary and popular color palettes. Theme any image to your desktop colorscheme!
Note: The binary usages are fairly stable, but any release that does make any breaking changes as such, are bumped to 0.X.0
git clone https://github.com/ozwaldorf/lutgen-rs
cd lutgen-rs
cargo install --path .
A nix flake is available and can be run easily with:
nix run github:ozwaldorf/lutgen-rs
Cache is provided via https://garnix.io
Usage: lutgen <COMMAND>
Commands:
generate Generate a hald clut for external or manual usage
apply Correct an image using a hald clut, either generating it, or loading it externally
patch Generate a patch for rgb colors inside text files
palette Print palette colors and names
completions Generate shell completions
help Print this message or the help of the given subcommand(s)
Options:
-h, --help Print help
-V, --version Print version
Correcting an image
# Builtin palette
lutgen apply -p catppuccin-mocha docs/example-image.jpg -o mocha_version.jpg
# Custom colors
lutgen apply docs/example-image.jpg -- "#ABCDEF" ffffff 000000
# Custom palette file
lutgen apply docs/example-image.jpg -- $(cat palette.txt)
# Multiple images
lutgen apply image1.png image2.png *.jpg -p catppuccin-mocha
# Using an external LUT
lutgen apply --hald-clut mocha_lut.png docs/example-image.jpg
Generating a standalone LUT for external or manual usage
# Builtin palette
lutgen generate -p catppuccin-mocha -o mocha_lut.png
# Custom colors
lutgen generate -o custom.png -- "#ABCDEF" ffffff 000000
# Custom palette file with hex codes
lutgen generate -o custom.png -- $(cat palette.txt)
Palletes
# Preview all palettes
lutgen palette
# Copy a palette to a file for tweaking
lutgen palette carburetor > carburetor.txt
# Finding a palette name with grep
lutgen palette --name-only | grep 'gruvbox'
Correcting videos (using ffmpeg):
ffmpeg -i input.mkv -i hald_clut.png -filter_complex '[0][1] haldclut' output.mp4
Zsh Completions
lutgen completions zsh > _lutgen
sudo mv _lutgen /usr/local/share/zsh/site-functions/
See the latest documentation on docs.rs
- Interpolation for more accuracy when correcting with low level luts (<16)
- Hardware acceleration for applying luts to images
- Hald Cluts: https://www.quelsolaar.com/technology/clut.html
- Editing with Hald Cluts: https://im.snibgo.com/edithald.htm
- Sparse Hald Cluts: https://im.snibgo.com/sphaldcl.htm
- RBF Interpolation: https://en.wikipedia.org/wiki/Radial_basis_function_interpolation
- Shepard's method: https://en.wikipedia.org/wiki/Inverse_distance_weighting
- Oklab Colorspace: https://bottosson.github.io/posts/oklab/
- Stonks3141 for maintaining the Alpine Linux package
- All the nixpkgs maintainers