can I average all layers?

MG
Posted By
mebig_Guy
Aug 11, 2004
Views
1054
Replies
4
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Closed
I am stacking multiple digital long exposure images, and somehow I’d like to be able to average them all with a full dynamic range. Screen mode layer blending doesn’t quite do that. For example, think of 10 identical images (layers. When I average them all, I still have the same image. With screen mode, I have a bright clipped mess. If I reduce the brightness of all 10 images to 1/10th then I won’t get clipping of the whites, but I lose all sorts of low end information. There are some programs out there to do this, but they don’t allow for re-registration of the images.

The answer is probably right in front of my face, but you know how it goes with photoshop.

Thanks,

me
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CC
Chris_Cox
Aug 11, 2004
You want normal blend mode with varying opacities for the layers.

Starting from the bottom most layer (call it layer 1) the opacity should be (100 / Layer#)

Two layers would be (bottom up): 100%, 50%
Three layers would be: 100%, 50%, 33%
Four layers would be: 100%, 50%, 33%, 25%
MG
mebig_Guy
Aug 12, 2004
doh…. that makes perfect sense

Thanks
DM
dave_milbut
Aug 12, 2004
wow. excellet.
Y
YrbkMgr
Aug 12, 2004
Ditto, Dave. Had my eyes glazing over until I saw Chris’ reply.

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