Pyspng is a small library to for efficiently loading PNG files to numpy arrays. Pyspng does not offer any image manipulation functionality.

Pyspng was originally written to speed up loading uncompressed (PNG compression level 0), making the PNG file format more suitable to be used in machine learning datasets. Pyspng uses the native libspng library for fast PNG decoding. Synthetic benchmarks indicate pyspng to be roughly 2-3x faster in loading uncompressed PNGs than the Python Pillow library.

Example

import numpy as np
import pyspng

with open('test.png', 'rb') as fin:
    nparr = pyspng.load(fin.read())

Installation

pip install pyspng

Note: binary wheels are built for Linux and Windows. MacOS may not work out of the box.

License

pyspng is provided under a BSD-style license that can be found in the LICENSE file. By using, distributing, or contributing to this project, you agree to the terms and conditions of this license.