Color Correction and Restoration - Beginning Photo Retouching and Restoration Using GIMP - page 99

Figure 4-34. Color correction edits will be made on a duplicate layer

5. Open the Curves dialog box (Image Menu ➤ Colors ➤ Curves). As in the

previous tutorial, because each color channel has a different tonal value, we're
going to make adjustments on each one, to revive both contrast and color. In the
Channels option, select the Red color channel (Figure 4-35 ). Move the node to
the left, stopping where the image data begins. (Wait until you adjust all three
color channels before clicking OK.)

Figure 4-35. Adjusting the Red channel in the Curves dialog

6. Select the Green color channel and move the nodes to where the image

information begins on the sides of the histogram (Figure 4-36 ).