Fixing a noticeable sky blend after photomerge?

[Jon Danniken]

Hello,

I created a panorama using photomerge with CS, and while the result turned
out okay, there is one particular section of sky, with a noticeable blend,
which I have been unable to fix.

I cropped the offending section, and you can see it here:
http://danniken.home.comcast.net/PanoFix01.jpg (60kb, 820x868, .jpg)

My question is how can I go about fixing this? What I "think" I need to do
is some type of compound gradient, from right to left, and from top to
bottom. Is there any way to do something like that?

How would you go about fixing this?

Thanks for any suggestions you are able to offer,

Jon

[C J Southern]

A couple of pointers ...

I've had best results if I shoot the series in manual mode - so I don't get
tone variations caused by different shutter speeds. A leveled tripod helps
too.

Consider a 3rd party stitching program - The Panorama Factory and AutoStitch
are both very good (the letter one is free, and does multi-row stitching).

As far as fixing your issue goes, a last-ditch way is to measure the colour
values of the top and bottom of your existing sky - then replace it with a
graduated fill layer (guaranteed cloudless day :)

[Ole Trenner]

Jon Danniken schrieb:

> I created a panorama using photomerge with CS, and while the result turned
> out okay, there is one particular section of sky, with a noticeable blend,
> which I have been unable to fix.

[...]

> How would you go about fixing this?

I would try to "apply" some of the clean parts of the sky to the
defective ones:

mark clean area -> "new layer from copy" -> resize and move new layer
(ctrl-t) -> blend new layer edges with background (e.g. layer mask).

The result could be something like this:
<http://www.ack2001.net/webfiles/files/PanoFix01_copy.jpg>

drawback: the scaling and/or mirroring of the image parts will change
the noise ("grain") distribution in the image, a keen eye can easily
notice the manipulation.

Ole.