Main Features of RT v2.3

January 20, 2008

Raw Therapee is a free RAW converter and digital photo processing software.

Main features :

• Selectable high performance demosaicing algorithms (EAHD and HPHD and VNG-4).
  Compare them on this comparison page.
• Using DCRaw 8.82/1.398 for decoding RAW images
• Image post processing in 16 bit / channel mode
  • Exposure control in RGB space
    • Auto exposure with adjustable clipping point / Exposure compensation / Shadow and highight compression / Contrast adjustment, curve editor
  • White balance adjustment in RGB space
    • With in-camera, automatic and spot white balance options / Temperature/Green tint fine tuning
  • Highlight Recovery
  • Shadows/Highlights control in RGB space
  • Basic Luminance curve tool to modify the luminance channel in CIELab color space
    • Brightness / Contrast adjustment, curve editor
  • USM sharpening applied on the CIELab luminance channel
    • Classical USM parameters (Radius, Amount, Threshold) / Option to avoid noise amplification / Sharpening halo control
  • Optional RL Deconvolution based sharpening for even better sharpening results
  • Color shift control in CIELab color space
    • Allows color shift by shifting the CIELab "a" and "b" channels
  • Color booster applied on the CIELab "a" and "b" channels
    • Amplifies color channels "a" and "b" together or separately / Avoids color overamplification in high chrominance areas / Option to avoid clipping caused by too high color boosting
  • Luminance denoising algorithm applied on the CIELab luminance channel
    • Edge sensitive method to preserve as much details as possible
  • Color denoising tool applied on the CIELab "a" and "b" channels
    • Classical gaussian blur or edge sensitive bluring of the color channels
  • Fast switching between different postprocessing profiles
  • Image flipping horizontally or vertically, rotation by 90 degrees clockwise or counter clockwise
  • Arbitrary image rotation (straightening tool)
    • with fill function or automatic crop
  • Simple lens distortion correction
  • Crop tool
  • Chromatic Aberration correction tool
  • Channel Mixer for Red, Green and Blue channels
  • C/A Correction
  • Vignetting Correction
• ICC based color management
• Change History with bookmarks to support before/after checking
• 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
• 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