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Photo Compositing Collage, montage, masking, selections, combining, etc.

Your best masking techniques.

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  #1  
Old 09-21-2006, 03:37 PM
KR1156 KR1156 is offline
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Your best masking techniques.

Lately there's a lot of work on skin going on, i would love to see everyones effort on an image that requires a lot of masking work, something high-end, like a shot of a female model with plenty of flowing/fly-away hair, etc. Where she needs to be totally silo'd from her background, and placed onto another flawlessly.

I have the perfect image for this, but can't get the photog's permission...does anyone here have any images they would like to provide for learning purposes?

I would love to see everyone's techniques and input, there are a lot of talented ppl on here...i think anyone who is interested in high-end beauty retouching would greatly benefit this "challenge"

-any takers?
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Old 09-21-2006, 04:08 PM
pellepiano pellepiano is offline
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Heres an example of mine.

http://www.pellepiano.com/studiobild...s/imageb14.jpg

I find the extract tool can give a pretty good start and the Russell Brown Layer Mask method is good but quite timeconsuming.
I shoot against a bluescreen.
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Old 09-21-2006, 06:16 PM
KR1156 KR1156 is offline
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extract is great when you have the contrast to work with, i would love to see how people manipulate channels to get their refined mask,,,what techniques are out there. what people are doing to separate those flyaways from a background with no contrast.

i have the masking book by katrin eisman, which is really good.
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Old 10-06-2006, 03:22 AM
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bart_hickman bart_hickman is offline
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Re: Your best masking techniques.

Quote:
Originally Posted by KR1156
extract is great when you have the contrast to work with, i would love to see how people manipulate channels to get their refined mask,,,what techniques are out there. what people are doing to separate those flyaways from a background with no contrast.

i have the masking book by katrin eisman, which is really good.
NO contrast? Well there's got to be some contrast. Here's a pathalogical one to torture yourself with:

http://www.pbase.com/zumbari/image/6...7/original.jpg

Bart
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Old 10-07-2006, 01:50 AM
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Daviskw Daviskw is offline
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Re: Your best masking techniques.

Well sure not my best ... bart that is a tough one. I think if I spent a little more time on the puppy's back edge it would not come out too bad... just more work than i want to do now... But if i was of a mind all it would take was a little work on the mask and some blurring.

To get where I am...

Duplicated the background

I used the pen to make a outline . Then converted the outline to a alfa channel. Then used that channel along with the extraction tool.

Made a selection mask of the extracted dog. and attached it to the duplicate layer... then erased the extracted layer.

Inserted my picture in the middle.

Butch
Attached Images
File Type: jpg original.jpg (99.7 KB, 236 views)

Last edited by Daviskw; 10-07-2006 at 08:52 AM.
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Old 10-07-2006, 02:00 PM
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bart_hickman bart_hickman is offline
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Re: Your best masking techniques.

Excellent job Butch. I didn't post my extracted version because it's a lot harder to explain than it is to do.

I usually start with the extract tool, then plan B is the background eraser. In this case I didn't think extract would work, so I skipped to the BGE which handled about 70%. 20% was image-based masking, 10% was manually erasing with a stipple brush (the part of the dog that has no contrast at all).

First attachment shows the beginnings of BGE work. After using the BGE, I do the rest of the extraction using other methods and I'll focus on a section extracted using image-based masking (more or less what Russell Brown describes in his video tutorial.)

In the places where the BGE doesn't work well, this image has some contrast information in all color channels,not just one, so I use the info from all three. The second attachment shows how that works.
1. Original
2. Sample the hair color near the edge of the hair, but where the hair completely blocks the background. Floodfill a new layer with this color and set blend mode to difference--now the edge hair is black, and everything else is some other color.
3. Add channel mixer--set the coefficients to 50,50,50 Could have done 100,100,100--the import thing is they are equal because I'm using information from all three channels equally. Choose monochrome to convert the color difference into a greyscale image.
4. Add a levels control to accenuate the contrast
5. Use a brush to clean the areas away from the edge of the hair. Good idea to make a marquee selection in case you accidentally slip while brushing.

That's my 2-minute tutorial on converting information from all channels into a single mask.

There's more finish-up work I'll describe later--gotta go right now. As a preview, the final attachment is my final result.

Bart
Attached Images
File Type: jpg pomy1.jpg (64.7 KB, 141 views)
File Type: jpg pomy_steps.jpg (94.6 KB, 106 views)
File Type: jpg extract_pomer.jpg (94.5 KB, 191 views)

Last edited by bart_hickman; 10-07-2006 at 03:10 PM.
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  #7  
Old 10-07-2006, 09:47 PM
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Craig Walters Craig Walters is offline
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Re: Your best masking techniques.

this is all mask, back and forth, black and white. i added the neutral gray to really show the work. masks are great because you never have to alter the work itself, just the mask.

craig
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File Type: jpg original-1-k-1.jpg (97.4 KB, 167 views)
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  #8  
Old 10-08-2006, 02:49 AM
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Gary Richardson Gary Richardson is offline
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Re: Your best masking techniques.

This is mine, made from the red channel.

Got it something like, then adjusted the mask using levels. Final tweaking done with a low opacity black/white brush.
Attached Images
File Type: jpg original-copy.jpg (99.4 KB, 141 views)
File Type: jpg Layers.jpg (14.7 KB, 62 views)
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  #9  
Old 10-08-2006, 07:46 AM
BillFrey BillFrey is offline
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Re: Your best masking techniques.

My masking didn't turn out great, so I used hair brushes to fix it up.
Attached Images
File Type: jpg originaledit.jpg (97.8 KB, 124 views)
File Type: jpg originalblkbkgrnd2.jpg (88.9 KB, 83 views)

Last edited by BillFrey; 10-10-2006 at 04:54 PM.
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  #10  
Old 10-08-2006, 10:10 AM
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Ying Ying is offline
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Re: Your best masking techniques.

I have a question: What if you need to extract a grey object from grey background?

I had to do this type of work a while ago and ended up creating custom clipping paths, which took forever to draw and adjust!

Attached is an example:
Attached Images
File Type: jpg Yachtmaster.jpg (77.1 KB, 90 views)
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