Duca
Posts: 3
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Registered: 19 Jan 2013
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Shoting for Spherical panorama
Posted: 19 Jan 2013 at 16:34 GMT
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Shoting for Spherical panorama
Hallo everybody,
I'm trying to rightly shot for spherical panorama but I still obtain bad results...
I' utilize of course a pano head (Panosaurus) with a Sigma 8-16 mm (that I use on 8mm) with a Canon 60D (crop factor 1,6x) . I shot 6 photos (one photo every 60°) for a 360° panorama and one photo on Zenith and one on Nadir (one above and one bottom). But I can't have a good spherical panorama. There is alwaya a bad alignment and /or a hole in the sky circle like in this screenshoot:
[URL=img836.imageshack.us/i/spahericalster.jpg/][IMG][/IMG][/URL]
Where do I make a bad setup?
And more... when and why Have I to shot vertically and whine and why horizontally? And in both cases (vert or Horz) maybe have I shoot 2 photos instead just one to better stitch ground and sky?
please help me!
many thanks!
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DennisS
Posts: 1622
Location: Los Anglels, United States
Registered: 1 Sep 2007
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John Houghton
Posts: 3710
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: Shoting for Spherical panorama
Posted: 19 Jan 2013 at 17:47 GMT
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Duca, 8mm gives you only a small amount of overlap between the zenith shot and the horizontal row. You need to position the zenith carefully to avoid the gap visible in your result. You could maybe tilt up the horizontal row shots a little or maybe shoot two zeniths. Little overlap makes it more difficult to find matching features for aligning the images. Otherwise, there's not too much wrong with your panorama that probably cannot fixed by proper stitching. It needs levelling to give a flat horizon, which takes less than a minute using PTGui:
See levelling tutorial at www.johnhpanos.com/levtut.htm
(BTW, your image is in Adobe RGB colour space. You should convert it to sRGB for display on the web).
The nadir clearly doesn't align properly. I imagine that the Viewpoint Correction feature in PTGui would deal with that ok. There's a viewpoint tutorial on the PTGui web site and another one here:
www.johnhpanos.com/ptgvpt.htm .
Caution: when you prepare your images for stitching, ensure that they are all in the same orientation - landscape or portrait. The camera's orientation sensor does not work when the camera is pointing directly up or down. Consequently, images can be output in random orientations. To avoid mixed orientations, it's simplest to disable the auto rotate feature in the camera.
John
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Duca
Posts: 3
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Registered: 19 Jan 2013
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Re: Shoting for Spherical panorama
Posted: 19 Jan 2013 at 20:24 GMT
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Many thanks guys,
I'm going to shot 2 Zenith and 2 Nadir + 1 more nadir hand made without tripod.
if I've further problem I say you. Many thanks to everybody.
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Duca
Posts: 3
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Registered: 19 Jan 2013
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