Post Reply 

Greying out a color image

Mar 22, 2012, 02:33
Post: #1
Greying out a color image
I have a jpg image of a face/neck/shoulders of a person, in color.
I'd like to grey-out just the person and leave the background white (like it is currently).
Can you guide me on how to accomplish that?

Find all posts by this user
Quote this message in a reply
Mar 22, 2012, 07:37
Post: #2
RE: Greying out a color image
If the background is truly white, then changing the image to monochrome is going to leave it white...

Otherwise the general technique for this is to duplicate the color layer, change one of the layers to B&W (Colors/Desaturate, or Channel mixer for a better result), make sure the top layer can be transparent ("Layer/Transparency/Add alpha channel"), and then erase bits of the top layer to see the other one through. Using "layer masks" instead of the eraser look a bot more complicated but is actually faster (errors are much easier to correct). Google for "layer mask" to find countless tutorials on the subject.

Now answering your questions on
Visit this user's website Find all posts by this user
Quote this message in a reply
Post Reply 

Possibly Related Threads...
Thread: Author Replies: Views: Last Post
  Desaturate to color KWiK 2 88 Oct 9, 2017 22:14
Last Post: KWiK
  Removing color from multiple images Aquilo 6 2,892 Sep 28, 2017 12:56
Last Post: angel0sdh
  Image centering for printing okfhp 1 227 Aug 23, 2017 17:51
Last Post: ofnuts
  "Open Image" change default folder and thumbnail view? Dave001 1 170 Aug 15, 2017 19:56
Last Post: ofnuts
  How to wrap paragraph text in an image arun67 0 149 Aug 12, 2017 12:46
Last Post: arun67

Forum Jump:

GIMP ForumPortalArchiveContactTermsRSS