Subject:
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Re: Background Screening (was: Re: Introduction, and my project...)
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Newsgroups:
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lugnet.publish
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Date:
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Mon, 20 Mar 2000 04:14:58 GMT
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Viewed:
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981 times
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Richard Franks wrote:
> Can you tell me how you managed to screen out the backgrounds so beautifully?
> I've been experimenting with white and purple screens, but neither seem to work
> terribly well..
Using these two before and after photos as an example:
http://www.mallorn.com/~lindsey/lego/castle/kingrear-640.jpg
http://www.mallorn.com/~lindsey/lego/castle/weather/kingrear-weather-5-640.jpg
The background in this case is just a white wall. To keep the lighting
even behind the scene (so that it's easier to pick out the background) I
use a 500w halogen work light with a sheet hanging a few inches in front
(this helps diffuse the light).
After the image is scanned or downloaded into the computer, I edit it
in Photoshop (I've tried using The Gimp, but finally gave up on it and ended
up having to buy a Windows machine (after years of resistance) just to do
my PhotoShop work (and scanning -- HPC5100A scanner support just
doesn't cut the mustard under Linux).
Anyhow, in PhotoShop I right click on the background with the "magic wand"
tool and select the "color range" menu option. I then go through and
manually remove stuff that wasn't supposed to be selected, add things that
were missed, etc. (I try to use a high tolerance setting to get as close
to the object's border as possible).
I then add whatever background I want to have (in my case, I did some
thinks with the "render clouds" filter). This is where problems come
up. Usually there's still a small whitish border around the edge of
certain objects. If I expand the highlighted area by a small amount
(say 5 pixels) and use the "Dust & Scratches" filter it removes almost
all of the jagged whiteness.
Although it sounds like more work than it's probably worth, it doesn't
take much more than 10 minutes or so to do an image... I know these
instructions aren't that great, but hopefully they'll get the idea across...
Chris
--
Remove the nospam machine name in my email address to send a personal reply.
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Message has 4 Replies:
 | | Photoshop Tricks in Pause(Was: Re: Background Screening)
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| (...) Ah, Photoshop....where would we be without it? I for one used it to clean up a few images in Pause...check out this doozy: (URL) lower half was completely hand-drawn except for the box scan...little white airbrushed stars, and a shadow to the (...) (25 years ago, 21-Mar-00, to lugnet.publish)
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