This GIMP (GNU) tutorial demonstrates how to create a moody, atmospheric light adjustment using the Levels Editor. 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.
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Open your 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).
Now, from the top menu, choose Colours and then choose Levels.
For personal results, it’s important to experiment with the Levels Editor. Perhaps repositioning the Grey (Gamma) and White Points, until you are happy with the result.
You can revert the Levels setting at any time by clicking the Levels Editor’s Reset tab. This is found at the bottom of the Levels dialogue box.
From the subsequent Levels Editor dialogue box, grab the Black Point (the tiny Black Triangle), and drag it to the right, as illustrated below.
Dragging the Black Point to the right, darkens your image - as illustrated below.
If you are happy with your result, complete the conversion by clicking the following OK tab. (If you’re not happy with the outcome, experiment with the settings until you discover settings that suit your photographic needs).
To create extra impact, apply a Sharpening Filter of your choice - Filters then Enhance.
Congratulations, your work is complete, and it is ready to save - top menu, then File then Save As.
Now you are more familiar with this technique, you can lighten or darken your photographs (with accuracy), using the Levels Editor.
Wendi E. M. Scarth. Top of Page.