Complex hair selection
I would convert to LAB mode and have a look at the A and B channels.
Duplicate the layer and run levels on one (or both) of the channels marking a black point on the background and a white point on the hair.
You should be able to make a pretty good mask combining these two channels.
This is how I would approach this: http://byloc.com/hair-extract.jpg
1. Original Image
2. Mask made using calculations. (Multiplied the inverse of an enhanced red channel into an enhanced blue channel.)
3. Result of applying that new alpha channel to the hair, we can clearly see the blue highlights.
4. Mask made with calculations by substracting the blue channnel with the red.
5. Result after using that second alpha channnel to mask a level (or curves) ajustment layer that subdued the blue cast.
Note that you can get much much bettter result if the file has better resolution and less jpeg artifact that the one that was posted. Hope this helps, good luck!
Last edited by meok; 01-17-2006 at 11:10 AM.
Last edited by superfrasky; 01-17-2006 at 12:58 PM.
Meok provided a great method which works fine on this picture. However there is perhaps a more useful method here which works on most images.
And Larry provided a great explanation here
Larry painted out the colour Before the extraction but it can be done after with a layer set to colour and applying the same mask. It can look more natural if you add some colour from the new background.
Hope this helps.
I think Meok must have a few extra steps. I don’t really understand calculations.
OK. I’ll try and learn with you.
Dupe the Red Channel
Dupe the Blue Channel
On the Red Copy Channel adjust levels
0 1.00 172
On the Blue Copy Channel adjust levels
0 1.00 213
Select Image > Calculations
Channel Blue Copy
Channel Red Copy Invert Checked
This makes a new Channel, Alpha1
Image > Adjust > Invert
30 1.00 192
This gives something very similar to Meoks Second Picture.
This was a challenge, but here's what I came up with.
Basically did a H/S to put some more color in the hair first.
Used the red and green channels combined (see the great calculation tutorial above, Thanks, Ken!) to generate a mask
Inverted the mask and deleted the blue background.
Used Photoshop's Color Replacement tool (Under the Heal brush) to replace any remaining blue spill. You can go back into Curves and soften the whole thing to more closely restore the ash blond (original) colors.
This looks best on a dark background.
|Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Selection Tool||T Paul||Scratch Pad||2||04-15-2009 10:46 AM|
|Help removing complex hair from crazy background||renato17||Image Help||16||11-24-2006 09:30 PM|
|Retouching Hair Strands - Does CS2 have a photo "TUBE" mode?||ray12||Image Help||3||09-06-2006 08:39 PM|
|How to make a perfect selection of hair ?||loornard||Image Help||14||03-02-2005 02:30 PM|
|13 Photoshop Selection Tips||DJ Dubovsky||Photo Compositing||5||10-20-2004 07:49 AM|