A .NET 5.0 command line tool to reduce image colors, dither them, and size them to fit nicely on Pimoroni eInk Displays
It's rough and fresh out of my brain. Build and runs on Windows & macOS. I haven't tested it yet, but I intend to run this on a Raspberry Pi, but just haven't got to that point yet. There's probably plenty that doesn't work right, so feel free to open an issue or PR if you find something.
For more about what inspired this, check out this post over on pimoroni/inky!
Right now, images are output at PNGs. However, they're not being created as 8bpp indexed pngs. (There is code to generate the images in that format, but System.Drawing.Bitmap seems to always write them as 32 bit PNGs for now.
Build it up, then invoke it from the command line. You can use the option --help to see the built in help, but a general use would look something like these:
$ # General help and command argument/option info
$ dotnet Inkify.dll --help
$ # Transform test.jpg using implied options:
$ # Inky Impression display,
$ # Stucki dithering algorithm,
$ # Saturated color palette
$ dotnet Inkify.dll transform "test.jpg"
$ # List available dithering algorithms (pass them to -e)
$ dotnet Inkify.dll ditherers
$ # Transform test.jpg with all available dithering algorithms,
$ # using the implicitly implied Inky Impression display as the target,
$ # with a color saturation percent of 0.7.
$ # (Will produce one output file per dithering algorithm)
$ dotnet Inkify.dll transform "test.jpg" -e All -s 0.7
$ # Transform test.jpg using the Floyd-Steinberg dithering algorithm,
$ # targeting the Inky pHat with the Black/White/Yellow display.
$ dotnet Inkify.dll transform "test.jpg" -d PhatYellow -e FloydSteinbergDitheringCertainly not entirely representitive, but if you just want to take a peek at the kinds of images Inkify can spit out, here you go:
Inkify is licensed under the Zero-Clause BSD License (SPDX-License-Identifier: 0BSD). If you're interested in Inkify under other terms, please contact the authors. Inkify makes use of several open source packages. Those packages are each covered by their own copyrights and licenses, which are available via the tooling you use to restore the packages when building.
Copyright © 2021 Chris March Dailey
Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
Inkify makes uses of several licensed portions of code, each licensed under their own terms by their authors. In particular, some of those software licenses require the following notices.
- The nuget package
cmdwtf.Ditheringis licensed under 0BSD from cmdwtf/Dithering. It is based on work by Cyotek Ltd.