This GIMP (GNU) tutorial demonstrates how to apply GIMP’s Gradient Map Filter. To work along, you are welcome to download the Start Image I am working with Here. Unzip the file and open the image onto GIMP’s workspace.
You can quickly Undo a step at any time by pressing Ctrl then Z. Alternatively, click a previous Undo History snapshot - Windows then Dockable Dialogues then click Undo History. In addition, to Zoom in (or Zoom out) of your image; from the top menu choose View then select a Zoom Tool from the subsequent drop-down list.
Launch GIMP & Organise Its Workspace & Palettes
Open your choice of Start Image onto GIMP’s workspace - File then Open - Ctrl then O.
Ensure the Layers and the Undo History Palettes are visible, and then drag them into position over your workspace - (Windows then Dockable Dialogues - then click Layers and Undo History).
Colour Palette Note
GIMP’s Gradient Map Filter consists of two colours, and these are influenced by the Foreground and Background Colour Swatches. Therefore, for personalised colours, it’s important to experiment with different Foreground and Background Colours.
Now, set the Foreground and Background Colour Swatches to the two colours you would like the Gradient Map to represent. I am selecting a Solid White Foreground and a Sugar Pink Background Colour.
Then from the top menu, choose Colours then choose Map and then choose Gradient Map. GIMP will now apply an automatic Gradient Map that consist of the Foreground and Background Colours.
Your image will benefit from a Sharpening Filter: Filters then Enhance.
Sharpen Images Tutorial.
Congratulations, your Gradient Map Conversion is complete, and it is ready to save - top menu, then File then Save As. GIMP 2.8 - File then Export.
Wendi E. M. Scarth. Top of Page.