31c6db52_GIMP_Selection_Tools__Description
[Tool] Foreground Select [Description] 
The Foreground Select tool was released in GIMP version 2.4. Using this tool is done in two steps. First, you make selection which contains the entire object. Then you paint over the selected area with a brush, not crossing object’s border. Release mouse button when you’re done and look to see if there are dark blue spots on your objects. If there are some, paint over them with a brush again and release to refine the selection. When there are no more blue areas inside the object, press Enter and your object will be selected.
GIMP Selection Tools
Description