canadian
Posts: 19
Location: United States
Registered: 11 Apr 2008
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Blending Nadir images.
Posted: 14 Jun 2008 at 17:43 GMT
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I've finally got my first outdoor panorama done (www.panoguide.com/gallery/859/), but as you can see, the seams on the patched Nadir are very obvious. How are you blending in your Nadir shots?
I tried to use the Adjust->Levels in CS3, but couldn't get it right since the shades differ from the top of the Nadir to the bottom.
Any pointers?
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Roger Hein
Posts: 40
Location: North York, Canada
Registered: 27 Sep 2006
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Vilmer
Posts: 451
Location: Argentina
Registered: 23 May 2007
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Re: Blending Nadir images.
Posted: 14 Jun 2008 at 22:47 GMT
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You could try the following:
1st, make the tripod disappear with a layer mask, leaving a transparent hole. (so you 1st have to promote your background layer to a normal layer actually)
2nd, make a selection on the surrounding, bigger than the hole you created,
3d promote this selection to a layer (layer>new>layer via copy)and move this over the hole
4th, use the tools under edit>transform to make this layer fit as good as possible over the hole, leaving a good margin between the edges of this layer contents and the actual hole.
5th, select both layers and click edit> auto-blend layers.
6th see the magic happen..
Regards,
Ronald
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John Houghton
Posts: 3487
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Blending Nadir images.
Posted: 15 Jun 2008 at 6:55 GMT
updated: 15 Jun 2008 at 6:58 GMT
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The question is about adjusting the brightness/colour of the patch so that it matches all round, given varying differences from top to bottom, say. If available, auto-blend might do a good job, otherwise the way to do it is to use graduated selections. For example:
1. Make a selection around the whole of the patch (in its own layer preferably) or part of the patch, as needed.
2. Switch into quick mask mode (using the icon in the toolbox). A red mask replaces the selection.
3. Select->Reselect. The selection appears again.
4. Drag a gradient black to white across the selection.
5. Switch out of quick mask mode (click on icon).
You now have what looks like half a selection. When you now make a global adjustment of levels, curves, exposure, hue etc., this will be applied to differing degrees across the whole selection. On one side there will be no adjustment, whereas on the other side the full adjustment will be made. This differential adjustment of brightness, hue and saturation is just what you need to adjust edges of the patch so that it matches all the way round. Get one side to match with a global adjustment, and then use a graduated selection to adjust the opposite side without affecting the first side.
John
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canadian
Posts: 19
Location: United States
Registered: 11 Apr 2008
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Re: Blending Nadir images.
Posted: 16 Jun 2008 at 17:14 GMT
updated: 16 Jun 2008 at 17:15 GMT
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Thank you for all of the suggestions. Through a combination of methods described here I have managed to get the nadir to a point where I feel it's acceptable. Now I just have to work on getting the patched area to line up better. I have re-uploaded the image to my gallery, so please take another look here www.panoguide.com/gallery/865/
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gus
Posts: 574
Location: United Kingdom
Registered: 19 Jun 2007
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Re: Blending Nadir images.
Posted: 17 Jun 2008 at 21:58 GMT
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It seems you have mastered it! Well done.
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