One of the easiest ways to bring a viewers attention to a portion of an image is via a selective focus effect. Unfortunately this feature isn’t built into GIMP but there are ways to get a similar effect. This tutorial will show you how to blur the background of an image in GIMP to achieve a selective focus like effect.
What is a Selective Focus Effect?
Selective focus is a photography technique where a photographer focuses on a single subject of an image. They achieve this by using a shallow depth of field which allows the subject to be in sharp focus while the rest of the scene is blurred. This isolation of the subject brings the viewer’s attention directly to it.
How the Blur the Background of an Image in GIMP
Step 1: Open the image you’d like to edit in GIMP
Step 2: Use any of the selection tools to select the area that you want to focus
Step 3: Hit Ctrl+C and then Ctrl+V on your keyboard
Step 4: Look in the
Layers toolbox window for a
Step 5: Click on the text of the
Floating Selection and rename it to something like “focused”
Step 6: You should now have 2 layers, left click the original layer to select it (this is now your background layer)
Step 7: Click
Filters in the toolbar at the top and select
Step 8: Experiment with the Blur Radius until you find a setting that you like (make sure the
Preview checkbox is checked to see a live preview)
Step 9: Click
OK when you’re satisfied with the result
You’ll likely have to play around with the settings to achieve the perfect effect. Try modifying the Blur Radius parameters and the Blur Method.