Darktable is an open source photography workflow application and RAW developer. A virtual lighttable and darkroom for photographers. It manages your digital negatives in a database, lets you view them through a zoomable lighttable and enables you to develop raw images and enhance them.
The internal architecture of darktable allows users to easily add modules for all sorts of image processing, from the very simple (crop, exposure, spot removal) to the most advanced (simulation of human night vision).
The user interface is built around efficient caching of image metadata and mipmaps, all stored in a database. The main focus lies on user interaction, both in terms of a smooth interface design as well as processing speed. High quality output is also goal.
darktable

darktable

General Info:

  • Darktable runs on GNU/Linux/Gnome.
  • Fully non-destructive editing.
  • All darktable core functions operate on 4x32-bit floating point pixel buffers, enabling SSE instructions for speedups. It offers GPU acceleration via OpenCL (runtime detection and enabling) and has built-in ICC profile support: sRGB, Adobe RGB, XYZ and linear RGB.
  • A collect plugin allows you to execute flexible database queries, search your images by tags, image rating (stars), color labels and many more. Filtering and sorting your collections within the base query or simple tagging by related tags are useful tools in your every-day photo workflow.
  • Import a variety of standard, raw and high dynamic range image formats (e.g. jpg, cr2, hdr, pfm, .. ).
  • darktable has a zero-latency fullscreen, zoomable user interface through multi-level software caches.
  • Tethered shooting.
  • darktable currently comes with 15 translations: albanian, catalan, czech, dutch, finnish, french, gaelic, german, italian, japanese, polish, russian, spanish, swedish and thai.
  • The powerful export system supports picasa webalbum, flickr upload, disk storage, 1:1 copy, email attachments and can generate a simple html-based web gallery. darktable allows you to export to low dynamic range (jpg, png, tiff), 16-bit (ppm, tiff), or linear high dynamic range (pfm, exr) images.
  • darktable uses both xmp sidecar files as well as its fast database for saving metadata and processing settings. All Exif data is read and written using libexiv2.

Changes in this release:

New features:
  • When appending EXIF data to an exported image, do not fail if reading of EXIF from the original file fails
  • Support XYZ as proofing profile
  • Clear DerivedFrom from XMP before writing it
  • bauhaus: when using soft bounds, keep slider step constant
  • Better brush trace handing of opacity to get better control.
  • tools: Add script to purge stale thumbnails
  • tools: A script to watch a folder for new images

Bugfixes:
  • Some GCC7 build fixes
  • cmstest: fix crash when missing XRandR extension.
  • Fix crash in Lua libs when collapsing libs
  • Mac packaging: some fixes
  • RawSpeed: TiffIFD: avoid double-free
  • Fix a few alloc-dealloc mismatches
  • DNG: fix camera name demangling. It used to report some wrong name for some cameras.
  • When using wayland, prefer XWayland, because native Wayland support is not fully functional yet
  • EXIF: properly handle image orientation '2' and '4' (swap them)
  • OpenCL: a few fixes in profiled denoise, demosaic and colormapping
  • tiling: do not process uselessly small end tiles
  • masks: avoid assertion failure in early phase of path generation,
  • masks: reduce risk of unwanted self-finalization of small path shapes
  • Fix rare issue when expanding $() variables in import/export string
  • Camera import: fix ignore_jpg setting not having an effect
  • Picasa web exporter: unbreak after upstream API change
  • Fix fatal crash when generating preview for medium megapixel count (~16MP) Bayer images
  • Properly subtract black levels: respect the even/odd -ness of the raw crop origin point
  • Collection module: fix a few UI quirks

How To Install?

>> Darktable 2.2.5 version available for Ubuntu 17.04 Zesty/16.10 Yakkety/16.04 Xenial/Linux Mint 18 and previous versions for Ubuntu 14.04 Trusty/12.04 Precise/Linux Mint 17/13
To install Darktable in Ubuntu/Linux Mint open Terminal (Press Ctrl+Alt+T) and copy the following commands in the Terminal:
Download source for other distributions. That's it
Source: Darktable
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