TJ: Does anyone know how to remove identical pixels on seperate layers in photoshop?Difference blending sort of does it but messes with all the colours as well.
Just trying to find the method such that if I draw on a picture it can delete all the identical pixels except for the ones where I drew on it, though obviously for something more practical like photography.
(,
Fri 17 Apr 2009, 18:37,
archived)
Just trying to find the method such that if I draw on a picture it can delete all the identical pixels except for the ones where I drew on it, though obviously for something more practical like photography.
you can copy the difference result and paste it to a new layerthen mess around with the brightness or use a threshold adjustment, and turn it into a selection (ctrl click on its layer thumbnail)
That should select the non-identical areas, for you to do whatever you want with them.
(That should select the non-identical areas, for you to do whatever you want with them.
Bloop Fri 16 Jul, 22:10,
Fri 17 Apr 2009, 18:51,
archived)
except you have to click in the channels window not the colour thumbnail. Bloop Fri 16 Jul, 22:10,
Fri 17 Apr 2009, 18:56,
archived)
The only problem with that is that you still get a black background which you have to select and delete manually and it always seems to give crappy edges.There doesn't seem to be any way to just either delete identical pixels or select identical pixels. What the fuck photoshop?
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Fri 17 Apr 2009, 19:04,
archived)
is the quickmask thing any use or does thisspecifically need two identical layers?
the crappy edges are because a pixel is either identical or not, feathering the selection or blurring the image might help.
(the crappy edges are because a pixel is either identical or not, feathering the selection or blurring the image might help.
Bloop Fri 16 Jul, 22:10,
Fri 17 Apr 2009, 19:07,
archived)
The quickmask thing does work with lots of steps, but it still has problems around colours and will delete all blacks not just the black from the difference blend.Pretty sure that method wouldn't work for video though. But I swear I've heard people extracting the backgrounds from videos purely by having a static shot clear from any people/objects, as an easy alternative to green screen, so how the fuck did they do it then?
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Fri 17 Apr 2009, 19:14,
archived)
There are add and subtract blending options hidden somewhere.In the "apply image" and "calculations" commands. Just reading about this in the help. Might do the job somehow. Or not.
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Fri 17 Apr 2009, 19:17,
archived)
think i get what you're after nowI'll have a go and see if I can work it out
( Bloop Fri 16 Jul, 22:10,
Fri 17 Apr 2009, 19:23,
archived)
Ahhh it's called difference masking when you do it for video, that's helped finding a lot of tutorial links.
I'd like to know how to do that toocould be used to extract moving objects from movies.
(,
Fri 17 Apr 2009, 18:52,
archived)
Unless you're just wanting a quickmaskpress Q and you can draw what you want removed, then press Q again and Delete.
Before you delete it you might need to invert the selection (Ctrl+Shift+I)
(Before you delete it you might need to invert the selection (Ctrl+Shift+I)
Bloop Fri 16 Jul, 22:10,
Fri 17 Apr 2009, 19:00,
archived)