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Raw Therapee is a free, multi-platform alternative to Adobe Photoshop Lightroom (RAW converter and digital photo processing software).

Raw Therapee

Key Features:

  • Selectable high performance demosaicing algorithms (EAHD and HPHD and VNG-4)
  • Using DCRaw 8.82/1.398 for decoding RAW images
  • Image post processing in 16 bit / channel mode
  • ICC based color management
  • File browsing with thumbnails
  • Localization supported (utf8 language file): already included languages are: czech, deutsch, english, espanol, italian, latvian, magyar, nederlands, polish, russian, slovak, swedish
Output options:
  • Supported file formats:
    • JPEG (8 bit), PNG (8 or 16 bit), TIFF (8 or 16 bit)
  • Image ouput size could be set
  • EXIF data is preserved in JPEG output (except crw files)
  • Output directory and automatic file naming highly customizable
And many more.

Download RAW Therapee (Windows, Linux: both 32 and 64 bit)

How to install RAW Therapee in Linux:

After downloading it, open a terminal and run the following command:
sudo mdir /opt
cd /directory_where_you_downloaded_raw_therapee
sudo tar -xvzf rawtherapee241.tgz /opt

Replace the bold text above with the appropriate value.

Now you can start RAW Therapee using the rstart file in /opt/RawTherapee241

Alternatively, you can create a shortcut to access this file, on your desktop or on a panel.

If you get an error, this might solve it:
sudo chown -R YOUR_USERNAME:YOUR_USERNAME /opt/RawTherapee241

Replace YOUR_USERNAME with your username.