Scott Knudsen
Posts: 3
Location: Canada
Registered: 8 Dec 2012
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Extending Stepped Sky?
Posted: 8 Dec 2012 at 14:20 GMT
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I merged some images in Photoshop and the sky is now stepped. I want to extend the lowest part of the sky to equal the highest part of the sky. How can I do this in Photoshop? The images was made up of 16 images, and is now a .PSB file.
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John Houghton
Posts: 3724
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Extending Stepped Sky?
Posted: 8 Dec 2012 at 18:27 GMT
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Scott, How you go about filling blank space around the panorama depends on the nature of the image content. Bland blue skies don't present too much of a problem, but lots of billowing clouds can be more difficult. A quick solution that can work well enough is to use the content aware fill feature in the more recent versions of Photoshop. The way to proceed is:
1. Select the blank area using the magic wand tool.
2. Expand the selected area a little (e.g. +10 pixels) using Select->Modify->Expand.
3. Fill the selection using Edit->Fill and select Content Aware from the pull down menu.
This is an example showing the filling of black space at top and bottom of an image: tinyurl.com/buqtq4v .
John
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Scott Knudsen
Posts: 3
Location: Canada
Registered: 8 Dec 2012
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Re: Extending Stepped Sky?
Posted: 8 Dec 2012 at 18:34 GMT
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Sorry, can't figure out how to attach an image. The sky has a fairly even colour.
I finally figured this out on my own. First I converted it into a TIFF, then as you said, select area, and fill with Content Aware.
I am curious though, is there a way to do this with a psb file that has a bunch of stitched together images as layers?
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Judy-A
Posts: 582
Location: Edmonton, Canada
Registered: 20 Jan 2010
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Re: Extending Stepped Sky?
Posted: 8 Dec 2012 at 18:37 GMT
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What kind of sky do you have — blue sky, cloudy sky, trees or buildings covering parts?
If you have Photoshop with content-aware patch tool, (CS5 or later I think) you could try using that.
For a blue sky:
1. Use eyedropper to pick up the blue from each end of the sky. (Use X key to switch swatches in Tool window.)
2. Make a new layer.
3. Fill the new layer with a gradient fill made from sky colors.
4. Give the new layer a layer mask. Paint black on the mask to reveal the underlying scene. Only the parts that need patching will show the blue gradient.
5. It may be necessary to adjust the gradient until colors blend nicely.
6. Merge sky-gradient layer into panorama layer.
If this doesn’t help, do a web search for “photoshop patch sky”. One of the many methods should help.
The permanent cure for stepped-sky panoramas is to put your camera on a well-aligned and leveled panorama bracket.
Judy
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Judy-A
Posts: 582
Location: Edmonton, Canada
Registered: 20 Jan 2010
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Re: Extending Stepped Sky?
Posted: 8 Dec 2012 at 18:46 GMT
updated: 8 Dec 2012 at 18:47 GMT
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Scott Knudsen said: I am curious though, is there a way to do this with a psb file that has a bunch of stitched together images as layers?
Depending on the images, you might be able to do this.
Select a small rectangular, horizontal strip from the top of each image. Cmd-J to clone. Cmd-T to bring up transform handles. Stretch the patch to the top of the panorama. Do this for each image.
The greatest problem with this method is that any specks in the sky will be stretched into vertical stripes. You may have to blur the patches before merging.
Judy
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Scott Knudsen
Posts: 3
Location: Canada
Registered: 8 Dec 2012
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Re: Extending Stepped Sky?
Posted: 8 Dec 2012 at 19:04 GMT
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Or use a wider angle lens. 
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John Houghton
Posts: 3724
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Extending Stepped Sky?
Posted: 8 Dec 2012 at 20:09 GMT
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Scott Knudsen said: Sorry, can't figure out how to attach an image.
You need to upload your image to your private web space or a file share service such as www.ge.tt/ (free) and post a line here.
I finally figured this out on my own. First I converted it into a TIFF,
Well, all you need do is open the PSB file and flatten it to form a background layer. Once the file has been opened, it's no longer PSB, TIFF, JPEG or anything else. The image data is converted to the required format when you save it.
I am curious though, is there a way to do this with a psb file that has a bunch of stitched together images as layers?
Why would you want to do that?
John
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