Talk About Network

Google





Graphics > GIMP (GNU Image Manipulation Program) > Re: Question ad...
Latest [ Topics | Posts ] Archive Post A New Topic Post a Reply
<< Topic < Post Post 7 of 9 Topic 3011 of 3173
Post > Topic >>

Re: Question adding transparency

by Huub <"v.niekerk at hccnet.nl"> Jun 28, 2008 at 09:50 PM

> 
> What you need to do is to make part of the image transparent. The steps 
> that you outlined in your original post won't give you what you want.
> 
> If the subject in your PNG image has a _distinctly_ different color than

> the (outside boundary of) the subject, you can just use Fuzzy Select 
> Tool to create a selection covering the background and just cut (i.e. 
> delete) it. The deleted pixels will become transparent.

My picture has 2 "colours" since it is a pencil drawing. So there is no 
distinct different colour, just black and white.

> 
> If, on the other hand, your subject gradually fades/blends into the 
> background, you need to do something a little more complicated. The 
> following is a modified version of a procedure I recently posted in 
> another thread:
> 
> 1. Open the original image in GIMP
> 
> 2. Use the Fuzzy Select Tool to create a selection of the background. 
> Experiment with different threshold settings to obtain a selection that 
> doesn't leave too much of an outline of the background color around the 
> subject you want to keep. (A threshold setting of 60 worked reasonably 
> well in my experimentation.)
> 
> 3. Give the selection feathered edges. (From the Select menu, select 
> Feather... and set the desired thickness of the feathered edges.)
> 
> 4. Use the Color to Alpha function under the Colors menu to convert the 
> background to transparent. The "From" color should be the background 
> color to be removed.
> 
> 5. Save the resulting image as a PNG file.
> 
> Let us know how you make out.

Late evening now, so I'll try tomorrow and let you know.
 




 9 Posts in Topic:
Question adding transparency
Huub <"v.niekerk   2008-06-28 15:03:15 
Re: Question adding transparency
Michael Soibelman <in-  2008-06-28 09:33:54 
Re: Question adding transparency
Huub <"v.niekerk   2008-06-28 19:59:08 
Re: Question adding transparency
Ofnuts <o.f.n.u.t.s@[E  2008-06-28 20:40:19 
Re: Question adding transparency
Huub <"v.niekerk   2008-06-28 20:57:58 
Re: Question adding transparency
Ricky Rudolph <a@[EMAI  2008-06-28 19:09:34 
Re: Question adding transparency
Huub <"v.niekerk   2008-06-28 21:50:32 
Re: Question adding transparency
Ricky Rudolph <a@[EMAI  2008-06-28 21:06:59 
Re: Question adding transparency
Huub <"v.niekerk   2008-06-30 21:43:09 

Post A Reply:
  Go here to Signup

AddThis Feed Button


About - Advertising - Contact - Frequently Asked Questions - Privacy Policy - Terms of Use - Signup

Contact
localhost-V2008-12-19 Wed Jan 7 22:21:47 PST 2009.