JPEG XL image format reference implementation

World's Leading Open Source JPEG 2000 Codec

Open-source implementation of JPEG2000 Part-15 (or JPH or HTJ2K)

NBLI is a fast, better lossless image compression algorithm. The optimized version (fNBLI) can get 1.5x compression ratio, 8x faster encoding, and 1.2x faster decoding compared to PNG. It can also beat the SOTA JPEG-XL.

Single Header Quite Fast QOI(Quite OK Image Format) Implementation written in C++20

An implementation of JPEG-LS extension (ITU-T T.870).

Haskell implementation of the QOI image format

Delphi / Free Pascal Compitable JPEG-LS Codec

Crystal bindings for Grok

A MATLAB implementation of JPEG 2000 Part 1 and Part 15 (HTJ2K) that complies with the conformance testing defined in JPEG 2000 Part 4. The goal of MatHTJ2K is to help a person who wants to develop an HTJ2K-based image compression system to understand the algorithms defined in HTJ2K.

This Powershell program can convert a variety of file types to WebP losslessly.

Lossless Image Compression and Transmission in Matlab

Discrete Wavelet Transform (DWT) Based Lossless Image Compression with Bitstream Truncation Support

Experimental PNG

Hiroki Kojima, Yasuyo Kita, Ichiro Matsuda, Susumu Itoh, Yusuke Kameda, Kyohei Unno, Kei Kawamura: "Improved Probability Modeling for Lossless Image Coding Using Example Search and Adaptive Prediction", Proceedings of the 25th International Workshop on Advanced Image Technology 2022 (IWAIT 2022), Jan. 2022.

Playing with lossless image compression based on the quadtree data structure

PAQ8PX compression archiver

Fast and efficient lossless image compression

CharLS Tools, a set of command line tools to CharLS JPEG-LS library

A simple command line tool for resizing the dimensions of an image or reducing the file size