Raw Therapee is another free editor for RAW files. yesterday I discussed Darktable, another program that you can use instead of Lightroom, but RAW Therapee is a real heavyweight in possibilities.

RawTherapee is an open source photo editing program that focuses on editing raw files. For an overview of the options we refer to this page on RawPedia. RawPedia is the name of the wiki for this program. The program has an overwhelming amount of options for editing your photos, but the program now seems to be doing more on the operator side and also on the efficiency of the program. The developers have released version 5.4 with the following announcement:

New functions in 5.4:

  • New standard processing profiles, now the standard appearance for unprocessed photos is closely aligned with the out-of-camera look with regard to tones and includes lens distortion and vignetting correction.
  • New tool for matching the histogram, so that RawTherapee automatically adjusts the image to match the look of the camera with the click of a button.
  • New HDR Tone Mapping tool to compress light into scenes with a high dynamic range, so you can display details in both shadows and highlights in a realistic way.
  • New Local Contrast tool for more clarity with a simple interface.
  • New color enhancement method L * a * b * Color correction grid.
  • New RCD demosicing algorithm to minimize artifacts, even in artificial light and strong chromatic aberration.
  • New icons for overlay overlay in the file browser and filmstrip to help you distinguish between normal images and HDR and Pixel Shift images.
  • Added support for displaying non-gamma areas based on the output profile.
  • Added support for reading and writing metadata and ICC profiles to and from PNG images.
  • Added support for processing Sony Pixel Shift ARQ raw files - make sure the ARQ extension is enabled in Preferences> File Browser> Explosive Extensions.
  • Create ARQ raw files from Sony with https://github.com/agriggio/make_arq
  • Added support for saving 32-bit floating-point TIFFs fixed to [0; 1].
  • Added support for profiled chromatic aberration correction with Lensfun.
  • More tools now have an on / off switch.
  • The user interface is cleaner, with all power-house tools moved to a new “Advanced” tab to prevent slider shock for newcomers.
  • On the Metadata tab you can now choose whether you want to copy unchanged metadata, edit metadata or strip metadata when saving images. You can now also change metadata in batch mode.
  • The choice of whether to display the main histogram information using the work profile or the output profile is now available via the top toolbar of the Editor tab.
  • The aspect ratio of the Crop tool is now by default on that of the image and RawTherapee automatically zooms in to adjust the crop as soon as it is placed.
    ICC-profielen van het RGB-invoertype kunnen nu worden gebruikt als uitvoerprofielen.
  • The saved reference image for profiling (created from the Color Management tool) now contains metadata.
  • PNG and compressed TIFF images use better compression.
  • Shortcut changes: zoom in to fit the crop with "f", adjust the entire image with "Alt + f".
RAW Therapee HDR
HDR Tonemapping in RAW Therapee

There were several hundred commits that optimized processing speed and memory usage, as well as bug fixes and code refactoring, although the details of this would be too mysterious to mention here. The effort involved thousands of developer hours and it shows. Apart from the highly optimized operation, it also looks a lot clearer.

Watch the video below for a first impression of the possibilities of the program.

Een start met RAW Therapee

You can download RAW Therapee from their weblog, but make sure you download the correct version that matches your operating system.



Download RAWTherapee from their own website. Don't forget to view the news and blog for great information.

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