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Home: Video University Forums: Digital Photography for Videographers:
What's that photoshop effect where you combine 3 images? HDR

Brackish
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Sep 19, 2007, 10:09 AM

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What's that photoshop effect where you combine 3 images? HDR	Can't Post

I forget the name of it but it was discussed here
a while back. You combine 3 identical shots into
one finished image, but each of the 3 shots was
exposed differently, through bracketing of the
exposure so as 1 shot is normal, 1 is lighter, and
1 is darker.

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"We'll always show up at the wedding with a gift bag for the bride. Inside we have these incredible fuzzy slippers in the teal of our branding."

(This post was edited by Brackish on Sep 20, 2007, 3:19 AM)

jgMbb
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Sep 19, 2007, 5:00 PM

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Brackish
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Sep 19, 2007, 9:39 PM

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Re: [jgMbb] What's that photoshop effect where you combine 3 images? [In reply to]	Can't Post

Thanks, jg.

Do you have any experience with this?

I have a picture where I bracketed the exposure. The 1st shot
has the subjects' skin properly exposed but the background
is overexposed. The 2nd shot has the subjects underexposed
but the background is exposed properly. I want to combine
the subjects of the 1st photo with the background of the 2nd
photo.

I'm not experienced with photoshop. I was thinking that maybe
using some of the same techniques used for the HDR work would
be the way to go. Anyone have any thoughts so far?

I tried taking the 1st photo where the background is overexposed
and using a slider to reduce just the highlights (i.e. the background)
but this also brought down the light on the subjects so this
will not work.

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"We'll always show up at the wedding with a gift bag for the bride. Inside we have these incredible fuzzy slippers in the teal of our branding."

szerangue
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Sep 20, 2007, 1:41 AM

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Re: [Brackish] What's that photoshop effect where you combine 3 images? [In reply to]	Can't Post

The thing there is that when you use the HDR preset it will combine your images so that if you are using a human subject they would have to have been perfectly still for all three exposures. Otherwise you would get a blurry subject but the background would look great.
Miracle Pictures
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Brackish
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Sep 20, 2007, 3:22 AM

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Re: [szerangue] What's that photoshop effect where you combine 3 images? [In reply to]	Can't Post

Well, I shot these in bracketing + burst mode so the subjects are almost
in identical postions.

The "HDR preset"? Is that in photoshop? I'm using Elements.

Is there any way it could be done with a mask?

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"We'll always show up at the wedding with a gift bag for the bride. Inside we have these incredible fuzzy slippers in the teal of our branding."

GmElliott
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Sep 28, 2007, 9:04 AM

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Re: [Brackish] What's that photoshop effect where you combine 3 images? HDR [In reply to]	Can't Post

Stack all three images, add a layer mask to the top two while holding the ALT key. This will create a layer masked filled with black. "Paint in" the hidden layers using a white brush on the masks.

Glen Elliott
http://www.GmElliottVideo.com

Xray
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Sep 28, 2007, 2:42 PM

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Re: [Brackish] What's that photoshop effect where you combine 3 images? HDR [In reply to]	Can't Post

One thing that comes to mind is Auto-Align Layers (new function in CS3). PS will combine number of layers in register and you can select best features of each image. Example: to eliminate 'blinkers'.

The other is Auto-Blend Layers - meging the layers via masks, tone, and colour matching.

Marcin
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