Filename extension .flif Open format? Yes | Magic number FLIF Website flif.info/index.html | |
Initial release 3 October 2015; 16 months ago (2015-10-03) Latest release 0.2.2(8 November 2016; 3 months ago (2016-11-08)) | ||
Free Lossless Image Format (FLIF) is a work-in-progress lossless image format claiming to outperform PNG, lossless WebP, lossless BPG and lossless JPEG 2000 in terms of compression ratio on a variety of Inputs.
Contents
FLIF supports a form of progressive interlacing (a generalization of the Adam7 algorithm), which means that any partial download of a compressed file can be used as a reasonable lossy encoding of the entire image.
History
The format was initially announced publicly in September 2015, with the first alpha release occurring about a month later, in October 2015.
The first stable version of FLIF was released in September 2016.
Design
For compression, FLIF uses MANIAC (Meta-Adaptive Near-zero Integer Arithmetic Coding), a variant of CABAC where the contexts are nodes of decision trees which are dynamically learned at encode time.