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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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