From: CheekyGeek
http://www.flickr.com/photos/pixelsmithy/4389949847/

If you view the full size image (click all sizes and then Original)
you'll see weird lines in the sky.
I'm guessing these are stitching artifacts (used Microsoft ICE).
Can anyone educate me the best way to handle them in post processing?
I have Photoshop CS2.
Thanks in advance.

My technique might be labor intensive but it's worked for removing other sky artifacts and it is not readily detectable.

I'd start by zooming out until the lines are barely visible instead of trying to work on them full size. I occasionally switch between full size (ctrl+alt+0) & fit to screen (ctrl+0) then go back to whatever level of zoom I'm working at.

I am, of course, a Windoze guy ... Mac has different hot keys.

Create a new layer, a copy of the background copy layer (ctrl+j).

I make a selection using the lasso tool, feather it a lot and alternate between a real soft clone stamp, spot healing brush and the blur tool just to break the visible edges. I just stomp away at it until I can no longer see the lines.

Then I make a selection on another area that has lines I want to get rid of ... rinse and repeat as necessary.

I create the new layer in case it doesn't work or I get in a hurry and become ham handed. Muck it up and I can just trash the buggered up layer, create another new layer and start over.

Periodically as I get part of it right I merge the new layer with the existing background copy to save the work I've already managed to get done.

Alternatively, you can select the whole sky with the magic wand tolerance = some low value ~ 5 works well, and then apply gaussian blur to the whole area.

Some combination of the several approaches seems to work best.

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