Stitching Nadir Shots - Revision history

Erik Krause: ->External links

2008-10-22T19:41:54Z

->External links

2008-10-17T14:22:23Z

2008-09-21T21:49:35Z

marked as out of date

2007-03-21T18:09:04Z

1 revision(s)

2007-03-21T18:07:00Z

2006-07-27T15:54:56Z

2006-07-13T20:31:18Z

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2006-07-13T20:30:07Z

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2006-07-13T19:56:43Z

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2006-06-24T10:02:35Z

Warning not to optimize abc in special cases

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 If you can't achieve a good result try to go for one side only - preferable the side with more detail and use some [[Zenith_and_Nadir_editing_overview#Patching_techniques|patching techniques]] to  correct the rest.
-<small>-[[User:Erik Krause|Erik Krause]] 18:18, 7 Jul 2005 (EDT)</small>
+==External links==
+A video tutorial of this process can be found on youtube: [http://youtube.com/watch?v=trYQ61_bOb0 PTGui nadir stitching]
-A video tutorial of this process can be found here [http://youtube.com/watch?v=trYQ61_bOb0 PTGui nadir stitching]
 [[Category:Tutorial:Nice to know]]
 {{Outdated|Talk}}

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 <small>-[[User:Erik Krause|Erik Krause]] 18:18, 7 Jul 2005 (EDT)</small>
 [[Category:Tutorial:Nice to know]]
 {{Outdated|Talk}}

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 One of the most catchiest points in creation of a spherical panorama is to stich a handheld shot of the place where the tripod stood for the other shots - the [[nadir]]. The camera is almost never in the same place as for the other shots. Hence there are parallaxe errors and most probably a different image scale.
-A Nadir images needs different treatment. If you use one of the [[GUI front-ends]] you can laod it together with the other images and crop it just the same (if necessary). But don't use it until the rest of the panorama is stitched to your satisfaction: Disable control points usage and exclude it from optimization.
+A Nadir images needs different treatment. If you use one of the [[GUI front-ends]] you can load it together with the other images and crop it just the same (if necessary). But don't use it until the rest of the panorama is stitched to your satisfaction: Disable control points usage and exclude it from optimization.
 I'll give the following explanation using PTGui but this should be applicable to any of the [[GUI front-ends]] accordingly.

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 Once you're satisfied with the rest of the panorama on '''lens settings''' tab check '''Use individual lens parameters''' for the nadir shot(s).
-Exclude all images but the nadir shot(s) from optimization: On '''optimizer''' tab page (advanced interface) uncheck all images but the nadir shot(s) in all parameter boxes and disable global optimization for Fov, a, b, c, shift and shear. Check the nadir image(s) in Yaw, Pitch, Roll and in the individual lens parameters boxes. Your screen should look something like this (image 0 and 1 are the nadir shots):
+Exclude all images but the nadir shot(s) from optimization: On '''optimizer''' tab page (advanced interface) uncheck all images but the nadir shot(s) in all parameter boxes and disable global optimization for Fov, a, b, c, shift and shear. Check the nadir image(s) in Yaw, Pitch, Roll and in the individual lens parameters boxes.
 [[Image:Nadir_Shot_01.jpg|frame|left|Optimizer tab page for nadir optimization]]
 {{clr}}