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Blending - rough egdes

Nov 4, 2012, 15:50
Post: #1
Blending - rough egdes

I'm having an extremely hard time blending two photos. I have the following two photos which I want to blend:

[Image: 8151885273_c49dcca275_z.jpg]


[Image: 8151884879_6f5722039d_z.jpg]

What I want to do is keep the sky from the second image. I want the border to be at the top of the trees. Now the edge of the trees is very uneven and difficult to select.

So I thought I would get around this by using a layer mask. To achieve this I took one of the images:

- desaturated it/turned it into monochrome/or decompose it
- used either levels or curves to try and get us much contrast as possible

and then used the resulting image as a mask. Unfortunately what happens is I get what looks like chromatic abberation at the edge of the trees and sky. Look here:

[Image: 8154175896_88de2d2682_b.jpg]

Click on the photo to see a large version.

Does anybody know why this happens and how it can be fixed?

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Nov 4, 2012, 23:30
Post: #2
RE: Blending - rough egdes
Despite all you efforts, your selection must be a bit off...

However, you shouldn't need an accurate selection there. Given the back-lighting, the darker sky should be imported together with the top of the trees, and should blend (feathered selection) with the lighter image about halfway down the trees.

Now answering your questions on
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