Free Lossless Image Format (FLIF) is a 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.[4]
FLIF supports a form of progressive interlacing (a generalization of the Adam7 algorithm) with which any partial download (greater than couple hundred bytes[5]) of an image file can be used as a lossy encoding of the entire image.
Jon Sneyers, one of the developers of FLIF, since combined it with ideas from various lossy compression formats to create a successor called Free Universal Image Format [Wikidata] (FUIF), which itself was combined with Google's PIK format to create JPEG XL. As a consequence, FLIF is no longer being developed.[1]
The format was initially announced publicly in September 2015,[6] with the first alpha release occurring about a month later, in October 2015.[2]
The first stable version of FLIF was released in September 2016.[7]
Designedit
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.
FLIF uses the reversible YCoCgcolor space[8] (unlike Y′CBCR that loses some color information to rounding errors, independently of its use in otherwise lossy JPEG). Not yet implemented are some features,[9] e.g. other "color spaces (CMYK, YCbCr, ...)". The color space conversion is faster, but the overall decoding (and encoding) is still slower than it needs to be, or some of the competition, even with the better color space as that is only a small fraction of the overall process. The format supports an optional alpha channel (RGBA) like PNG (but unlike JPEG); and progressive coding, similar to PNG (unlike it, progressive compression doesn't increase file-size), but as FLIF's algorithm is more complex (and partly, may not have had as much tuning of the implementation yet), it has a higher computational cost; at least lower bandwidth requirements can offset some of that extra time. Progressive coding reduces FLIF's performance.
FLIF has some tuning parameters which can result in differently sized images. All of the images are still lossless. A flifcrush tool is also available to achieve the minimal size.
Lossy compression can be achieved by preprocessing. The process is deterministic and does not cause generation loss.
FLIF Optimizer – tuning parameters for better lossless compression
April 13, 2024
free, lossless, image, format, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sources, news, newspapers, books, scholar, jst. This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Free Lossless Image Format news newspapers books scholar JSTOR September 2017 Learn how and when to remove this template message Free Lossless Image Format FLIF is a 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 4 Free Lossless Image FormatFilename extension flifInternet media typeimage flifUniform Type Identifier UTI public flifMagic numberFLIFDeveloped byJon Sneyers and Pieter WuilleLatest releaseFLIF16Extended toFUIF JPEG XL 1 Open format YesWebsiteflif wbr infoFLIF reference implementationInitial release3 October 2015 8 years ago 2015 10 03 2 Stable release0 4 21 November 2021 2 years ago 2021 11 21 3 Repositorygithub wbr com wbr FLIF hub wbr FLIFWebsiteflif wbr info FLIF supports a form of progressive interlacing a generalization of the Adam7 algorithm with which any partial download greater than couple hundred bytes 5 of an image file can be used as a lossy encoding of the entire image Jon Sneyers one of the developers of FLIF since combined it with ideas from various lossy compression formats to create a successor called Free Universal Image Format Wikidata FUIF which itself was combined with Google s PIK format to create JPEG XL As a consequence FLIF is no longer being developed 1 Contents 1 History 2 Design 3 Support 4 References 5 External linksHistory editThe format was initially announced publicly in September 2015 6 with the first alpha release occurring about a month later in October 2015 2 The first stable version of FLIF was released in September 2016 7 Design editFor 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 FLIF uses the reversible YCoCg color space 8 unlike Y CBCR that loses some color information to rounding errors independently of its use in otherwise lossy JPEG Not yet implemented are some features 9 e g other color spaces CMYK YCbCr The color space conversion is faster but the overall decoding and encoding is still slower than it needs to be or some of the competition even with the better color space as that is only a small fraction of the overall process The format supports an optional alpha channel RGBA like PNG but unlike JPEG and progressive coding similar to PNG unlike it progressive compression doesn t increase file size but as FLIF s algorithm is more complex and partly may not have had as much tuning of the implementation yet it has a higher computational cost at least lower bandwidth requirements can offset some of that extra time Progressive coding reduces FLIF s performance FLIF supports grayscale RGB and RGBA with color depth of 1 to 16 bits per channel 8 FLIF has some tuning parameters which can result in differently sized images All of the images are still lossless A flifcrush tool is also available to achieve the minimal size Lossy compression can be achieved by preprocessing The process is deterministic and does not cause generation loss Support edit nbsp UGUI FLIFXnView supports FLIF since version 2 36 10 ExifTool supports reading and writing metadata in FLIF images since version 10 31 11 UGUI FLIF supports preview and converting PNG file to FLIF 12 IrfanView supports reading FLIF images since version 4 52 13 14 References edit a b Notice for JPEG XL 12 April 2020 Retrieved 19 January 2021 a b Release v0 1 alpha FLIF hub FLIF 3 October 2015 Release v0 4 FLIF hub FLIF 21 November 2021 FLIF is a New Free Lossless Image Format That Raises the Compression Bar PetaPixel 2 October 2015 Retrieved 20 October 2016 Image compression race PNG Adam7 vs FLIF time 0 00 6 September 2015 Retrieved 19 January 2021 Free Lossless Image Format FLIF 6 September 2015 Archived from the original on 12 September 2015 Release v0 2 FLIF hub FLIF 22 September 2016 a b FLIF16 Specification flif info Retrieved 28 November 2019 YCoCg Heuristics Issue 258 FLIF hub FLIF Pierre Emmanuel Gougelet 8 November 2016 XnView 2 39 XnView Retrieved 15 September 2017 Phil Harvey 19 October 2016 ExifTool Ancient History ExifTool Retrieved 1 November 2017 UGUI FLIF Download flif info Retrieved 27 December 2018 Irfan Skiljan 12 December 2018 History of IrfanView Changes Versions 4 52 current 2018 12 12 Retrieved 28 December 2018 Kuki Dent 13 December 2018 IrfanView 4 52 has been released today IrfanView Support Forum Retrieved 28 December 2018 External links edit nbsp Free and open source software portalFLIF official site FLIF on GitHub PolyFLIF a Javascript library to decode FLIF in browsers FLIF at Open Hub Phew native macOS FLIF viewer FLIF Optimizer tuning parameters for better lossless compression Retrieved from https en wikipedia org w index php title Free Lossless Image Format amp oldid 1196353489, wikipedia, wiki, book, books, library,
