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Looking for good tutorial on extraction

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  #1  
Old 04-28-2002, 11:25 AM
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Ed_L Ed_L is offline
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Looking for good tutorial on extraction

I'm trying to get used to using the extraction tool in Photoshop 7. I downloaded three images to try extracting, and two of them have been reasonably good. But I'm having trouble with this one, and I was wondering if anyone knew of a good tutorial.

Ed
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Old 04-28-2002, 12:21 PM
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OW! Just the thought of extracting that one hurts

I know you're hoping to learn more about extraction, but seriously I'd never consider the extraction tool for this image. Come to think of it, I rarely consider the extraction tool at all.

Great shot, though.

There was an excellent movie that ships with Martin Evening's "Photoshop for Photographers" that demonstrates a technique of using other PS tools to select the area where the extraction is to take place, saving the selection, then using a dialog box in the extraction tool to reload it, thus increasing precision and decreasing the amount of work the extract had to do.
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Old 04-28-2002, 01:15 PM
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Thanks Doug. I downloaded this image because it had all the fine hairs. And with reasonably good contrast with the background, I thought it might be fairly easy. I had considered using other avenues for extraction, but I wanted to learn about the extraction tool. Do many people use it, or is it just an overrated tool?

Ed
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Old 04-28-2002, 01:22 PM
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If you downloaded it, the resolution might be the problem. Even our Challenge images rarely have sufficient resolution for decent masking, let alone extraction.
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Old 04-28-2002, 01:29 PM
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Aha! I didn't even think about that!

Ed
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Old 04-28-2002, 02:08 PM
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I'm no expert...

I'm not an expert, but I've been trying different things and this seemed to work - it needs some cleaning up, but this technique seems to have done a good job of selecting all the little hairs....

I duplicated the background (following Katrin's advice to never work on the original background :smile:

Next, I did command+option+tilde (that's the ~ thingy) to select the luminosity of the picture. delete. Do this a coule of times until you've gotten rid of most of the background. Then I just used the eraser to remove the rest of the background and added an orange backdrop so you can see the fur better.

Margaret
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Old 04-28-2002, 07:44 PM
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Margaret,

That looks like a very successful technique. I also have her book, but didn't try any techniques other than using the extract tool. Thanks for posting.

Ed
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Old 04-28-2002, 11:42 PM
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Extract Tutorial possiblities

Hi Ed:

Like you I'm not as familiar with the Extract tool as I'd like to be (think I should be). I flailed around with it a few times and for me, found it a little ackward to use; perhaps I didn't give it a long enough shot. In any event over time I've gravitated toward other techniques and tools, e.g., the "locate the color channel with the highest contrast and build a mask from it" or hauling out the big gun, Procreate Knockout.

Once upon a time I was poking around for Extract tutorials; found a couple that looked promising, so I added them to my "favorites." Have to confess my intentions were/are good, but the fact is I haven't gotten around to checking them out yet. Perhaps one might be useful to you.

http://webdesign.about.com/library/weekly/aa090501a.htm

http://www.creativepro.com/img/story/ExtractHair.pdf

http://www.soniacoleman.com/Tutorial...d4/method4.htm

http://www.adobeevangelists.com/pdfs...ks/Extract.pdf

http://graphicssoft.about.com/gi/dyn...technique.html


Hope one of these is helpful.

Cheers...
~DannyR~

Last edited by DannyRaphael; 04-29-2002 at 12:29 AM.
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  #9  
Old 04-29-2002, 03:26 AM
Stephen M Stephen M is offline
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http://www.ps6.com/Tutorials/Extract/intro.html

http://www.ps6.com/Tutorials/select.html

http://members.ozemail.com.au/~binar...V_links.html#M

Hope this helps,

Stephen Marsh.
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Old 04-29-2002, 12:29 PM
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Danny and Stephen,

Thanks very much for the links. I'll surely check them out, hoping to learn a thing or two.

Ed
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