#RawTherapee added to #OSX FreeSMUG directory

News » #RawTherapee added to #OSX FreeSMUG directory

Posted on 02 Sep 2015 17:21

RawTherapee raw image processing program added to Graphic directory.

RawTherapee is a cross-platform raw image processing program, released under the GNU General Public License Version 3. It was originally written by Gábor Horváth of Budapest. Rather than being a raster graphics editor such as Photoshop or GIMP, it is specifically aimed at raw photo post-production. And it does it very well - at a minimum, RawTherapee is one of the most powerful raw processing programs available.

General Features

  • All the standard features you would expect from a raw developer and much more,
  • A batch processing queue to make tweaking a photo as fast as possible while leaving the CPU grunt work queued up for later,
  • Floating point engine - the only raw developer on the market which does all calculations in precise floating point notation so nothing gets rounded off and lost,
  • SSE optimizations for better performance on modern CPUs,
  • Color management using the LittleCMS v2 color management system for more precise color handling, providing control over working and output color space,
  • Support for reading and tone-mapping 16-bit, 24-bit and 32-bit floating-point HDR images in the DNG format,
  • File browser featuring colored tagging, searching (by text matched to the filename), metadata filtering (by file type, camera model, lens model, photo parameters),
  • Support for DCP and ICC color profiles, for precise colors or for replicating the “camera look” to match out-of-camera JPEG images,
  • A history panel to easily see what changes you made and jump back to a specific point,
  • A snapshot panel to work with multiple versions of changes to a photo,
  • A flexible UI where panels and some individual elements can be adapted or hidden,
  • Easily pan around photos much larger than your screen thanks to pan rate amplification, eliminating the need for numerous and fidgety mouse movements,
  • Scroll the tool panels using your mouse scroll wheel without worrying about accidentally misadjusting any tools, or hold the Shift key while using the mouse scroll wheel to manipulate the adjuster the cursor is hovering over,
  • Maximize screen-space by right-clicking on a tool to keep it visible while automatically collapsing the other ones,
  • A Before|After view to compare your latest change to any previous one,
  • Support for PP3 processing profiles (sidecar files), whole and partial,
  • Show various channels in the preview: red, green, blue, luminosity and a focus mask,
  • Show various channels in the histogram: red, green, blue, CIELAB luminance, chromaticity and raw,
  • Color clipping indicators in the preview,
  • Export Panel with Fast Export Options,
  • Keyboard shortcuts to speed up work,
  • Command line support to automate RawTherapee using scripts or call it from other programs,
  • Support for most cameras,
  • Support new raw formats by simply editing the [[camconst.json]] file in a text editor,
  • Audio feedback to inform you when a CPU-intensive task completes e.g. when the queue is done being processed,
  • Preserve IPTC and XMP of pre-tagged files,
  • Adapt RawTherapee to use your system interface's color scheme and widgets or try the provided custom color schemes,
  • Localization in almost 30 languages.

Exposure and Color Features

  • The Auto Levels tool tweaks your photos to provide a good starting point,
  • Various powerful methods of shadow and highlight recovery and reconstruction,
  • Post-crop Vignette Filter,
  • Graduated Filter (GND),
  • Pipette tool, which, when activated for a specific curve, lets you pick a point on the image preview and then places a corresponding adjustment point on that curve,
  • Two RGB tone curves, each with four methods of control, for unprecedented control of colors and exposure,
  • Hue, saturation and value (HSV) and red, green and blue (RGB) curve adjustments,
  • Wealth of Lab adjustments for separate control of colors and luminance:
    • L* curve for control of lightness,
    • a* curve to control the position of a color between red/magenta and green,
    • b* curve to control the position of a color between yellow and blue,
    • LH curve to control luminance as a function of hue,
    • CH curve to control chromaticity as a function of hue,
    • HH curve to control hue as a function of hue,
    • CC curve to control chromaticity as a function of chromaticity,
    • LC curve to control luminance as a function of chromaticity,
    • CL curve to control chromaticity as a function of luminance.
  • Avoid color shift by using Munsell correction,
  • Vibrance control,
  • Preservation of natural skin tones,
  • Tone mapping based on edge-preserving decomposition for a natural look,
  • White balance - automatic, manual or one of a wide variety of predefined sources,
  • Channel Mixer,
  • Black-and-White conversion,
  • Several methods of color toning,
  • Support for [[Demosaicing#Monochrome_Cameras|monochrome]] cameras
  • Adaptation of the CIECAM02 color appearance model ratified by the International Commission on Illumination (CIE) to maintain accurate colors and to, given a set of initial viewing condition parameters, convert the image so that it will look the same under the target viewing conditions. Image processing using CIECAM02 is enabled via a number of methods, using curves and sliders. A multitude of tools are adapted to auto-switch to CIECAM02 mode when in use, including [[Tone Mapping]], [[Sharpening]], [[Defringe]], etc.
  • Color management.

Detail Features

  • Various sharpening methods:
    • Unsharp mask featuring a unique and powerful threshold slider to bring out detail while avoiding halos,
    • RL deconvolution to undo the blur,
    • Edges true sharpening to enhance edges,
    • Microcontrast to enhance texture,
    • Contrast by Detail Levels using wavelet decomposition into five levels of detail.
  • Very powerful wavelet-based noise reduction in the RGB and Lab color spaces,
  • Impulse noise reduction to eliminate salt-and-pepper type noise,
  • Defringe tool for elimination of purple fringing (or other color).

Transformation Features

  • Perspective correction,
  • Adobe Lens Correction Profile support for automatic correction of distortion, vignetting and chromatic aberration,
  • Distortion correction,
  • Post-demosaic chromatic aberration correction,
  • Pre-crop vignetting correction.

Raw Pre-Demosaicing Features

  • Various demosaicing methods to start off by squeezing out the most detail possible from your raw photo:
    • AMaZE,
    • IGV and LMMSE for use with noise reduction to prevent maze patterns,
    • EAHD,
    • HPHD,
    • VNG4,
    • DCB,
    • AHD,
    • Mono,
    • Fast.
  • Line noise filter,
  • White and black point adjustment,
  • Dark frame subtraction to eliminate some forms of noise,
  • Flat field correction to easily correct vignetting, lens color cast and sensor dust,
  • Manual and automatic chromatic aberration correction.


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