Python QOI

QOI (Quite OK Image format) is a new lossless image format that achieves compression rates close to PNG with a 20x-50x faster encoding.

This here is a naive Python way of implementing the QOI compression format and of course much slower than the C implementation.

There's a python wrapper around the original C implementation, which retains the C performance.

The CLI interface was liberally borrowed from Python QOI (py-qoi). The encoder/decoder is an reimplementation.

Requirements

The only requirement besides Python 3.10+ is Pillow to load and save images in formats other than QOI, and numpy for matrix manipulations.

Usage

To encode an image:

python3 qoi-quedvi/qoi.py -e -f image_file.png

The input image may be of any pillow-supported format. A file with name image_file.qoi will be saved on the same folder as the original image.

To decode a QOI image:

python3 qoi-conv/qoi.py -d -f image_file.qoi

A file with name image_file.png will be saved on the same folder as the original image.

usage: qoi-quedvi/qoi.py [-h] [-e] [-d] [-f FILE_PATH]
optional arguments:
  -h, --help            show this help message and exit
  -e, --encode
  -d, --decode
  -v, --verbose         get additional info
  -f FILE_PATH, --file-path FILE_PATH
                        path to image file to be encoded or decoded