Correcting Tone and Exposure - Beginning Photo Retouching and Restoration Using GIMP - page 71

Tutorial 7: Correcting an Underexposed Image
An underexposed image this dark might seem beyond saving, but using the Screen blend mode can bring it
back. It works amazingly well, in many cases.
To correct this image, follow these steps:

Open the image ( Ch3_dark boat ) found in the Practice Images folder (Figure 3-43 ). 1.

Figure 3-43. Very underexposed and dark image

2. Duplicate the background layer (Shift + Control + D). Rename the duplicate layer

Lighten, and change the blend mode to Screen (Figure 3-44 ). We can see that this
has made quite a difference, but the image is still too dark.