An implementation of various image dithering algorithms (and related ideas like random quantization) in Rust, behind a CLI.
dither is written in Rust, so you'll need to install that first in order to compile it.
To build:
$ git clone git@github.com:nwj/dither.git
$ cd dither
$ cargo build --release
$ ./target/release/dither
For convenience, you can then copy or otherwise add ./target/release/dither to your $PATH.
The CLI can be called with a single path argument pointing to an image you'd like to dither:
dither image.jpg
This will default to using the Floyd-Steinberg dithering algorithm and will save the results to a new file that has been named accordingly
> dither image.jpg
> ls
image-floyd-steinberg.png image.jpg
Optionally, the CLI accepts a --mode (or -m) flag which allows you to specify a different dithering algorithm and an optional second positional argument to specify a desired output file name.
> dither -m atkinson image.jpg output.jpg
> ls
image.jpg output.jpg
A full list of supported dithering algorithms and their corresponding --mode arguments is available via dither --help.