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#1 2012-01-19 16:25:08

aceJJ
New member
Registered: 2011-12-09
Posts: 4

stitching vertical aerial photos over clear shallow water

Hi all,

I am quite new to autopano giga but have found it to be a great tool for stitching panoramas for aerial photography - on land.  After completing a vertical aerial photo run of a shallow caribbean lagoon (approx 6-8' depth on average) I am attempting to mosaic approximately 200 photos with appropriate amounts of overlap between images present.  When using one flight line as a test (about 25 photos), I have found that as an output I am getting about 6 very small mosaics (2-5 photos each mosaic) and not all images are included.  I have a feeling it has to do with glare that is present, waves and light attenuation?  I am wondering if anyone has any tips I could try in terms of filters (of the imagery) or anything else that may help autopano have an easier time finding control points.  Even if I could somehow tell autopano to only use darker colors when stitching (coral heads and rock) it might make things easier.

Thanks for any help you can provide,

Jeremy

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#2 2012-01-19 20:24:23

mediavets
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From: Isleham, Cambridgeshire, UK.
Registered: 2007-11-14
Posts: 8083
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Re: stitching vertical aerial photos over clear shallow water

Do you shoot a regular grid pattern?


Andrew Stephens
Nikon D40, Nikkor 10.5mm fisheye, Sigma 8mm f3.5 fisheye, Nikkor 18-55/50/35mm  lenses, Nodal Ninja 5 Lite, Agno's Mrotator TCSshort
Nikon P5100, CP5000, CP995, FC-E8, WC-E63,WC-E68, TC-E2, Kaidan Kiwi 995, Bophoto pano bracket
Merlin/Orion panohead + Papywizard on Nokia 770/N800 and Windows XP/2K

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#3 2012-01-19 20:44:34

aceJJ
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Registered: 2011-12-09
Posts: 4

Re: stitching vertical aerial photos over clear shallow water

Yes, with *theoretically* 30% overlap both along a line and between flight lines

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#4 2012-01-19 23:04:27

mediavets
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From: Isleham, Cambridgeshire, UK.
Registered: 2007-11-14
Posts: 8083
Website

Re: stitching vertical aerial photos over clear shallow water

aceJJ wrote:

Yes, with *theoretically* 30% overlap both along a line and between flight lines

Then you could perhaps try using the Gigapan Import Wizard if your pattern follows one of the supported patterns.

Or use the Papywizard software in simulation mode to create an XML data file and use the Papywizard Import Wizard.

Download the Papywizard software from here (chose one of the development versions):
http://www.papywizard.org/wiki/Download … ntversions


I've no idea whether either would help place the images in the correct relative positions when the camera itself moves between shots but perhaps it's worth a try?

Last edited by mediavets (2012-01-20 00:26:00)


Andrew Stephens
Nikon D40, Nikkor 10.5mm fisheye, Sigma 8mm f3.5 fisheye, Nikkor 18-55/50/35mm  lenses, Nodal Ninja 5 Lite, Agno's Mrotator TCSshort
Nikon P5100, CP5000, CP995, FC-E8, WC-E63,WC-E68, TC-E2, Kaidan Kiwi 995, Bophoto pano bracket
Merlin/Orion panohead + Papywizard on Nokia 770/N800 and Windows XP/2K

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#5 2012-01-19 23:17:49

aceJJ
New member
Registered: 2011-12-09
Posts: 4

Re: stitching vertical aerial photos over clear shallow water

Thanks for the advice Andrew, I'll give those a shot and let you know how I get on

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