PDA

View Full Version : Extracting an object from an image




Apogee
Sep 4, 2008, 06:01 AM
Hi all...

I've been trying to find an application that can let me extract an object from within an image automatically. Does such a tool exist on OS X?



fluidedge
Sep 4, 2008, 07:34 AM
Preview in leopard has "Instant Alpha" that might help

http://www.apple.com/macosx/features/300.html#preview

onegirlcreative
Sep 4, 2008, 11:22 AM
I have never heard of such a tool existing, but that doesn't mean it doesn't exist. I just take it into Photoshop and use the lasso tool and remove it that way. But I guess if you don't own a copy of PS, that could be expensive.

jampat
Sep 4, 2008, 12:54 PM
I'm not exactly sure what you are trying to do, but GIMP can do most things that Photoshop can. It's not quite as easy to use and doesn't have some of the toys, but it's free.

fluidedge
Sep 4, 2008, 01:39 PM
Post up the image i'll have a go for you. I'm not an expert but someone will help you if you post the image

3D ED
Sep 8, 2008, 06:23 AM
There is no such one method or program that would work in all chases.
But like said before you can lasso the object in gimp or photoshop.

Anyways. In movies blue or green is taken away and made invisible
so other footage is shown from "behind"
This same thing can be used for stills, you can remove a color and
what is left is the object. but IF the object is shot in front of single color background that is evenly lit.

hmm. I will mention a silly theory of mine. There is such a thing as difference
matte. If one did have 2 perfect, I emphasize the word PERFECTphotos/images
of the same "scene" one with object and one without then it would be a few click allmost instant thing in many graphics and Visual Effects softwares.:D
but its only in theory