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About the developer

182 Stars 69 Forks GNU Lesser General Public License v2.1 4.2K Commits 54 Opened issues


fast raw decoding library

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Contributors list

rawspeed |github actions| |travis-ci| OBS_ |codecov| |oss-fuzz|

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.. _OBS:

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RawSpeed Developer Information

What is RawSpeed?


  • is capable of decoding various images in RAW file format.
  • is intended to provide the fastest decoding speed possible.
  • supports the most common DSLR and similar class brands.
  • supplies unmodified RAW data, optionally scaled to 16 bit, or normalized to 0->1 float point data.
  • supplies CFA layout for all known cameras.
  • provides automatic black level calculation for cameras having such information.
  • optionally crops off “junk” areas of images, containing no valid image information.
  • can add support for new cameras by adding definitions to an xml file.
  • decodes images from memory, not a file stream.
  • is being continuously fuzzed |oss-fuzz| as part of the
    _ project.
  • is currently tested on |rpu-button-cameras| unique cameras, on |rpu-button-samples| unique samples. Please read
    _ for more info on how to contribute samples!
  • open source under the
    LGPL v2
    _ license.

.. _oss-fuzz:

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.. _LGPL v2:

RawSpeed does NOT

  • read metadata information, beside whitebalance information.
  • do any color correction or whitebalance correction.
  • de-mosaic the image.
  • supply a viewable image or thumbnail.
  • crop the image to the same sizes as manufactures, but supplies biggest possible images.

So RawSpeed is not intended to be a complete RAW file display library, but only act as the first stage decoding, delivering the RAW data to your application.

Version 2, new cameras and features

  • Support for Sigma foveon cameras.
  • Support for Fuji cameras.
  • Support old Minolta, Panasonic, Sony cameras (contributed by Pedro Côrte-Real)
  • Arbitrary CFA definition sizes.
  • Use pugixml_ for xml parsing to avoid depending on libxml.

.. _pugixml:

Getting Source Code

You can get access to the latest version using

from here 
_. You will need to include the “RawSpeed” and “data” folder in your own project.

CMake-based build system is provided.

Integration into LLVM LNT / Test-Suite

It is possible to natively integrate the RawSpeed into LLVM test-suite, and use

_ to do testing, benchmarking, performance tracking. For quick overview please see
LLVM LNT / Test-Suite Integration 

Background of RawSpeed

The main objectives were to make a very fast loader that worked for 75% of the cameras out there, and was able to decode a RAW file at close to the optimal speed. The last 25% of the cameras out there could be serviced by a more generic loader, or convert their images to DNG – which as a sidenote usually compresses better than your camera.

RawSpeed is not at the moment a separate library, so you have to include it in your project directly.

Please see for documentation. Doxygen-generated documentation is available at

Submitting Requests and Patches

Please go to the

github page 
_ and submit your (pull)requests and issues there.

.. _rawspeed:

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