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tomas62
Joined: 16 Jun 2012
Posts: 16
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 Posted: Sat Jun 16, 2012 7:26 am Post subject: How to merge layers (actual pixel data)? |
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How do I merge (average-out) layers?
For example, if I have an image in layer 1 which has lots of reds, and an image in layer 2 which has lots of blues, how can I simply select the two layers and merge/average-out them? So the resulting 'merged' layer is purple?
Please note, this method needs to work with multiple layers (sometimes much more than 2!) and each image/layer needs to be weighed equally.
I know how to average out two images. I just make the above layer 50% opacity. But the percentages get more complicated as you have more images and more tedious. Would be nice if there was a 'average out selected layers' button...
Any ideas?
Thanks! |
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SCTRWD
Joined: 20 Jul 2011
Posts: 79
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| Posted: Sat Jun 16, 2012 10:08 am Post subject: |
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There is nothing complicated about average. The formula is simple:
100/N,
where N is the position of layer. That is: the first layer -(the bottom one) - 100%
the second - 100/2 = 50%
the third - 100/3 = 33,3%
the fourth - 100/4 = 25%
the fifth - 100/5 = 20%
and so on...
This is classic. But you can, of course, do it modern way: simply select your layers, turn them to Smart Object and choose Layer->Smart Objects->Stack Mode->Mean.  |
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tomas62
Joined: 16 Jun 2012
Posts: 16
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| Posted: Sat Jun 16, 2012 6:49 pm Post subject: |
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Hi, thanks for explaining that! I always wondered how the percentages were calculated, and had a feeling they would decrease as you go up, but couldn't figure out how it was done.
However, I'm having trouble getting the modern way to work.
'Stack mode' is grayed out and I can't select it. |
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SCTRWD
Joined: 20 Jul 2011
Posts: 79
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| Posted: Sat Jun 16, 2012 8:54 pm Post subject: |
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Make sure you did everything right:
Select all your layers in the Layers panel, then go to
Layer->Smart Objects->Convert to Smart Object, then choose Layer->Smart Objects->Stack Mode->Mean. |
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tomas62
Joined: 16 Jun 2012
Posts: 16
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| Posted: Sat Jun 16, 2012 10:58 pm Post subject: |
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Ah! I got it working 
Thanks a lot! I did a right-click smart object before that's probably why it didn't work. |
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andyhaha
Joined: 16 Jun 2012
Posts: 3
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| Posted: Sat Jun 16, 2012 11:47 pm Post subject: |
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| SCTRWD wrote: | There is nothing complicated about average. The formula is simple:
100/N,
where N is the position of layer. That is: the first layer -(the bottom one) - 100%
the second - 100/2 = 50%
the third - 100/3 = 33,3%
the fourth - 100/4 = 25%
the fifth - 100/5 = 20%
and so on...
This is classic. But you can, of course, do it modern way: simply select your layers, turn them to Smart Object and choose Layer->Smart Objects->Stack Mode->Mean. |
wow thanks for the explanation.
_________________
Ilmu Photoshop |
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