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about libraw libraw skip to main content libraw raw image decoder looking for fastrawviewer it is here main menu about news documentation supported cameras download extended support forum feedback about libraw the libraw library provides a simple and unified interface for extracting out of raw files generated by digital photo cameras the following raw data pixel values metadata necessary for processing raw geometry cfa bayer pattern black level white balance etc embedded preview thumbnail the library is intended for use with programs that work with raw files such as raw viewers raw converters raw data analyzers software for stitching and compositing multi frame aggregates like panoramas and image stacks using the libraw library allows one to focus on the substantive part of processing the data contained in raw files without getting distracted by the wide variety of raw file and metadata formats compression algorithms etc the library s development is focused on support for new cameras and formats improving extraction of metadata necessary for raw processing providing an interface for reading other types of metadata additionally the libraw library offers some basic raw conversion intended for cases when such conversion is not the main function of the libraw using application for example a viewer for 500 graphic file formats including raw these methods are inherited from the dave coffin s dcraw c utility see below the project history section their further development is not currently planned because we do not consider production quality rendering to be in the scope of libraw s functionality the methods are retained for compatibility with prior versions and for rapid fire testing of raw support and other aspects licensing the libraw library is distributed free of charge and with open source code subject to two licenses 1 gnu lesser general public license version 2 1 2 common development and distribution license cddl version 1 0 to use the libraw library in an application you can choose the license that better suits your needs if you modify add improve the libraw source code then your patches can only be included into the library s official source code if you agree to it being distributed under both of the above licenses we do not guarantee that the licensing will not change in future versions of libraw update policy major minor releases major releases for example 0 20 are published once every year and a half to three years when the first public beta version of a major release is published the list of supported cameras and formats is frozen we try but do not guarantee to freeze the api abi as well the public major release contains only that code which has been sufficiently tested on a wide user base including in our commercial products something very new may not be included in it but it will probably be included in a public snapshot see below minor updates 0 20 1 0 20 2 do not change the api abi and new cameras are not added generally they are just bugfixes bugfixes are published as soon as possible in the public github repository minor version increments these are generally published if a serious error has been fixed one that potentially affects many library users for example a possible stack overflow public snapshots public snapshots are published every 9 18 months in the public github repository these versions contain support for new cameras that was added after the previous major release the api abi of public snapshots is not frozen and may change public snapshots are always tested on a fairly large user base and may be considered suitable for use in programs that work with files with known origins that is recorded directly by users digital cameras however public snapshots should not be considered sufficiently reliable for processing files that are specially constructed for vulnerability testing that is they should not be used in public services that allow for anonymous processing of files of unknown provenance support and feedback you can submit a bug report in one of the following ways issues on github the libraw org forum feedback form on libraw org e mail us at info libraw org questions can be asked on the forum through the feedback form and via the email indicated above please do not use issues on github for questions it is intended specifically for problem reports we prefer to process additions to the source code via the pull requests on github we cannot guarantee any response to requests submitted via the above methods if you need a guaranteed response for a bug report and or for extending technical support please use the extended support option project history the libraw project was launched in 2008 based on the dcraw c dave coffin utility with its goals being to convert dcraw c into a library that could be used by other programs while also somewhat improving the structure of dcraw c removing global variables making it thread safe etc import changes made to dcraw c improve expand the extraction of metadata unfortunately support for dcraw c was reduced to a minimum in 2015 and completely ceased in 2018 since then support for new cameras including support for new formats has been done entirely by the libraw team the code that implements rendering of raw to rgb is inherited from dcraw c without major changes though a set of changes was implemented to speed up and parallelize this code in the early to mid 2010s we gladly expanded post processing implemented in libraw and readily accepted the input of outside developers new improved methods for debayerization demosaicing systematic noise reduction etc experience has shown that the libraw team cannot support this added code on their own while contributors do not provide support and development of the code they suggest and it ends up abandoned as such the majority of the modifications that are implemented by people outside the libraw team was moved to the libraw demosaic pack where they remain in their original form but these projects are still present in our github thus we arrive at our current status described in the first part of this text copyrights and acknowledgements copyright c 2008 2024 libraw llc libraw uses code from dave coffin s dcraw c utility without restricted gpl2 code copyright 1997 2018 by dave coffin dcoffin a cybercom o net libraw uses dcb demosaic code by jaceck gozdz distributed under bsd license copyright c 2010 jacek gozdz cuniek kft umcs lublin pl libraw uses roland karlsson s x3f tools source code licensed under bsd license copyright c 2010 roland karlsson roland proxel se downloads stable release 0 22 1 new downloads changelog articles displaying l channel in photoshop festina lente bayer moire chasing a gray cat in a gray room the level of middle gray and the headroom in the highlights for canon 5d mark ii two paths leading nowhere more articles user login username password create new account request new password navigation forums popular content recent content recent comments this is a necessary 2 weeks 2 days ago i can t seem to publish the 4 weeks 16 hours ago we ve explained width height 2 months 2 days ago you re welcome d 2 months 1 week ago thank you very much 2 months 1 week ago more recent blog posts 0 22 1 release libraw 0 22 release libraw 0 21 5 libraw 0 22 prerc1 libraw 0 21 4 libraw 202502 snapshot libraw 0 21 3 libraw 202403 snapshot libraw 0 21 2 libraw 0 21 1 release more new forum topics x trans 6 pixel margin alignment shifts the active area and loses 2 rows cols vs the camera s exif crop x pro2 class assistance wanted with white balance processing i think problem with colour of images libvips 8 18 has a libraw loader mismatch between size reported after libraw_open_file and decoded image size more today s popular content about libraw download libraw 0 22 supported cameras noob python libraw and fujifilm raw are my libraw rawpy settings giving me true unprocessed sensor data for cie 1931 xyz color space conversion more popular content about libraw download dcraw_make_mem_thumb raw decoding processing library libraw 0 20 supported cameras more active forum topics x trans 6 pixel margin alignment shifts the active area and loses 2 rows cols vs the camera s exif crop x pro2 class mismatch between size reported after libraw_open_file and decoded image size problem with colour of images assistance wanted with white balance processing i think libvips 8 18 has a libraw loader more copyright 2008 2026 libraw llc