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Hemant

Extracting subject from green background

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hi, 
i hv so many files like this to extract, 
may i know the easiest way to do that, 
right now m doin it with color range n all, 

thanks 

IMG_0006_2.jpg

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n now i cant find a way to do it near hairs and behind dress ..
 

IMG_0053.JPG

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This is why we don't recommend using green at all for shooting images like this (unless, of course, you intend to have a portrait of a subject against a bright green background).  Getting rid of all the bright green in the hair and the veil is going to be a giant pain, to say nothing of the color casting (all those green reflections on the clothing and skin and hair!) and how difficult you've made it for yourself to mask or blend your subject against any other color at all...

But since you've already shot these images, and assuming reshooting them isn't an option...

Can you show us the background you want to use to replace the green?  

And while you're pulling that up, this tutorial might be helpful (though again, with the green, you've made this unnecessarily difficult for yourself).

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thanks for reply , i understand that, 

but i Didn't shoot these, m just editing, 
and m not replacing background, all i hv to do is cut the subject out.
m gonna go chq this link now,  
thanks again
 

 

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18 minutes ago, Hemant said:

and m not replacing background, all i hv to do is cut the subject out.

And then what?  What are they being used for?

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some promotion stuffs n all, awards function kinda, 
they jus need separate subjects which they gonna use for promotional composites, 
  

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i'll return these to photographer as psd, and thn he'll also forward as psd probably

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i woudn't mind, but these photos dsnt belong to me,  
sry but its better if it stays here, 
 

and ya m sending u that file

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Thanks.

I have to bolt out and do the grocery shopping, because there's nothing in the house, and I'll write it up for you when I get back.

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Ok, here goes ...

(Note: This method only works in Photoshop. If you had Elements, you'd be outta luck.)

1. Add a Channel Mixer layer and check the Monochrome box, and enter 0/100/0:

IMG_0053_steps-01.thumb.jpg.0eb8729a28b2

2. Add a Levels layer and bring the white slider in as far as you can to make the background pure white, but not lose too much hair detail.  This is a delicate balancing act.  It's a good idea to hold down the Alt key while sliding the slider, so you can have a good view of what's clipping.  Then do the same with the black slider, to fill in as much hair detail as you can, but not so far that you fill in unwanted detail too.

IMG_0053_steps-02.thumb.jpg.2ef4e4d79f76IMG_0053_steps-03.thumb.jpg.045ba4db457e

3. Invert the mask on that layer, then paint it only around the edges where it's needed - the hair and the veil in this case.  No need to be very precise with this painting step.

IMG_0053_steps-04.thumb.jpg.f4b6108c6d60

Here's the mask view so you can see a bit more clearly:

IMG_0053_steps-05.thumb.jpg.19d8db51e9b3

4. Add a white Solid Color layer, then a black Solid Color layer.  Invert the mask on both layers so they're hidden:

IMG_0053_steps-06.thumb.jpg.e39c4727db40

5. On the black layer, start painting to completely and carefully obscure the subject where she needs to be completely preserved.  Leave the wisps of hair to be wispy, of course.  I started with her head:

IMG_0053_steps-07.thumb.jpg.6cf80da3abad

It's not a bad idea to turn all the other layers off sometimes, while doing this, so you're painting black over the original colour photo.  That's what I did while going around that tricky trophy thing she's holding:

IMG_0053_steps-08.thumb.jpg.f41386df55d0

To save your sanity, for heaven's sake make sure you use this method around the dress and other simple edges.

Eventually, the subject will be completely black:

IMG_0053_steps-09.thumb.jpg.580049312c92

I want to say that it's not vital to be accurate.  In fact, it's better if you allow a tiny bit of room inside the edge of the subject.  See how I've left a thin line of dress visible here?

IMG_0053_steps-10.thumb.jpg.b81d6d55b468

6. Then paint on the mask of the white Solid Color layer, to make the whole background perfectly white.  This should be very quick, because around the hair it's already white, so no precision necessary, and around the dress, you can paint straight underneath the black layer you already did before.

IMG_0053_steps-11.thumb.jpg.a3209b575904

7. Add a new blank layer (this might not be necessary in all versions, but this step can be a bit buggy, so do it anyway.)

8. Ctrl Alt Shift 2 (Mac: Cmd Opt Shift 2) to make a luminosity selection (gives you marching ants all around the white areas):

IMG_0053_steps-12.thumb.jpg.89c1b6a4972d

9. Turn off all the layers except for the Background layer. (You should still have the marching ants active).  Go to the Select Menu and choose "Inverse".  This will make the marching ants go around the subject, not the background:

IMG_0053_steps-13.thumb.jpg.4da839284598

10. Double-click the Background layer to turn it into "Layer 0", then immediately Ctrl G to put it into a layer group (remember, you should still have the marching ants while you do this):

IMG_0053_steps-14.thumb.jpg.4bed3579c9c8

11. Click the mask button in the Layers panel to add a mask to the group. The marching ants will disappear, and so will the background:

IMG_0053_steps-15.thumb.jpg.0c247fd32a32

12. In the layer group, above Layer 0, add a new blank layer and call it "Colour Fix", and change its blend mode to "Color":

IMG_0053_steps-16.thumb.jpg.8cccdd4cb94c

13. Temporarily close the layer group by clicking its little arrow.  Then add another white Solid Color layer and move it to the very bottom of the layer stack, below the group:

IMG_0053_steps-17.thumb.jpg.4869c4be0498

14. Then open the group again, and return to the "Colour Fix" layer you just made.  This layer will serve the same purpose as it does for fixing Chromatic Aberration.

When you zoom in, you'll see traces of green everywhere:

IMG_0053_steps-18.thumb.jpg.0db1e7bf924f

So you sample various nearby colours, and start painting over that green, like this:

IMG_0053_steps-19.thumb.jpg.b958f4a73b1f

Even the veil still has a hint of green tinge to it:

IMG_0053_steps-20.thumb.jpg.0af637251616

So you sample some purple colour and paint with low opacity to get rid of it:

IMG_0053_steps-21.thumb.jpg.9374b23516ed

The bottom is the worst - look at that awful green cast!

IMG_0053_steps-22.thumb.jpg.7908a7319853

Sample and paint gently over it:

IMG_0053_steps-23.thumb.jpg.86a1f6eeb5e4

15. Finally, it should be done.  All the edges should be their correct colour.  You should be feeling proud of yourself right now

The last thing to do is change the bottom white layer to medium grey, and check the edges again to make sure everything's ok:

IMG_0053_steps-25.thumb.jpg.7f131d8b8b93

16. Then you can turn that bottom layer off, to see the photo in its transparent glory.

Then finally, go to the Image menu and choose Trim, and trim away the transparent pixels:

IMG_0053_steps-26.thumb.jpg.efb6337fb437

Leaving you with this:

IMG_0053_steps-27.thumb.jpg.6bcd6490f4d8

Save that PSD for yourself. That's your master file if you need to come back to it.

17.  Finally, click on Layer 0, then go to the Layer menu and choose "Merge Visible".  Then delete all the layers which are turned off, leaving you with this:

IMG_0053_steps-28.thumb.jpg.2c2a9b748a60

Save that as a different PSD file, that's the one you'll send to your client.

Hope this helps.

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m gonna give it a try, 
never knew such methods exist -_-

hope i can pull out the same result as u xD

thanks 

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Woah this was amazing! I hope someone else has a similar photo that they can submit so you can make this tutorial for your website! 

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Not as perfect as urs, 
But better thn i could ever achieve without throwing money on plugins, 
hope to improve it, 

Jus 1 last quetion, - Do u ever get tired of being amazing ? 
:D 

IMG_0231B.jpg

IMG_0231A.jpg

IMG_0231AC.jpg

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