GIMP - Create contrast mask

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Revision as of 15:58, 21 July 2012 by Dlk (talk | contribs)
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  1. Create duplicate layer containing image
  2. Select the duplicate layer and Colors->Desaturate
  3. Colors->Invert
  4. Change Mode: Overlay in Layers dialog box
  5. Filters->Blur->Gaussian Blur. Set Blur Radius between 10 and 30.