# Dithering with OpenCL

## Background

[Project Proposal PDF](https://seodisparate.com/static/uploads/EN605.617.81.FA21_ProjectProposal.pdf)

The proposal mentioned dithering live-input frames, but I ended up with just
dithering single images or turning a video into dithered images.

The "develop" branch may have more up to date code.

# Usage

A "blue-noise" image is integral to dithering images. A generated blue-noise
image is provided in the "res/" directory. Run the program with "--help" to get
info on how to use it.

PNG, PGM, and PPM image formats are supported.

For decoding video, any format that ffmpeg can read should work (though if
things don't work, try using MP4 files).

~~WARNING: Video decoding is still a WIP. The video is currently decoded, but an
output video being encoded hasn't been implemented yet. The current
implementation writes each video frame to a PNG image in the current
directory.~~

Video decoding and encoding is finished, but there is some noticable drops in
quality when encoding to colored dithered video. It may be better to just
output each frame to individual PNGs, then combining them later just like as
mentioned here: https://trac.ffmpeg.org/wiki/Slideshow .

# Other Notes

~~I plan on adding the MIT License to this project once the course (that this
project was made for) is over.~~

I went ahead and applied the MIT License earlier than noted here.

# Legal Stuff

[This program uses FFmpeg which is licensed under the LGPL 2.1 license](https://ffmpeg.org/legal.html)