[Gimp-user] Gimp newbie trying to get a job done.

[rich <forums gimpusers com>]

> THANK YOU!

> I have been burning brain cells on this for a while.  I do have one final question.  Like in the case where 
> there was green in all sorts of places, how could I go and change all the green areas to any color that I 
> want, in only a couple of clicks?

> File/Save

> On 1/25/2012 11:26 AM, Brent Shifley wrote:
> > Here is the url to the file:

> > This is actually a much simpler graphic than what I would normally be 
> > using, but you get the idea. In as few clicks as possible, I just want 
> > the green areas, and want the rest of the graphics transparent.
> >
> > Brent Shifley

The great thing about Gimp is there is always another way.

Have to confess, my first thoughts were with the G'mic plugin but maybe a better way for your specific case 
is 

Convert the image to indexed with a small number of colours
Edit the colour map so anything non green is (say) white
Back to RGB mode and colour-to-alpha to remove the white.

Short demo - 2 mins here http://youtu.be/xVy4rwoye6o


-- 
rich (via gimpusers.com)