Using Masks and Layers—Painting, Filling, and Color Tools - GIMP 2.6 for Photographers: Image Editing with Open Source Software - page 275

Figure 3.89
gardapanorama.xcf
with the preposi-
tioned imported
layers and the open
Layers dialog
• Load the images garda2.png through garda4.png, one after the other. These
will be the additional layers for the panorama. Set them active one after
the other. From the Layers dialog, drag and drop the Background layers to
import them into the image window of the gardapanorama.xcf image.
• Try to position them so that they overlap.
• Name the layers according to the original names of the images. After you
import them, you can close the original images.
• Add an alpha channel to every layer (right-click on each layer to access
the context menu).
• Save your gardapanorama.xcf image. It should look like the example in
Figure 3.89.
• Next, adjust the color level in the individual layers ( Colors > Levels or Colors
> Curves ) to match the color, contrast, and brightness of the images. Use
the imported layer from the Garda3 image as a starting point, since its
color and brightness is of average quality, compared to the others.
• Mark the overlapping sections in the individual layers with vertical
guides. Drag them into the image by clicking into the ruler and holding
the left mouse button.
• Now create a selection with the Rectangle Select tool . This selection should
begin at the center, where the Garda1 and Garda2 layers overlap, and
should reach to the left beyond the border of the Garda2 layer (as in figure
3.91 ). Choose a soft selection edge of about 120 to 200 px ( Select > Feather ).
The value of the feathering depends on the size (width) of the overlap.