Skridlov
Posts: 232
Location: United Kingdom
Registered: 12 Nov 2007
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PTGui 9.0.4. VP correction problem
Posted: 6 Jul 2011 at 16:16 GMT
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I recently updated to this version. I've just assembled a pano using the tried and tested methods and all's well until I try to add the offset viewpoint correction shot. After the second optimisation, checking the VPC check-box, the optimizer still reports errors in the thousands of pixels - and subsequent unusable stitching.
I'd appreciate any clues anyone might offer. I've removed the file, replaced it and reset the control points, to no avail. Having previously done a few hundred panos without any errors, this is a bit alarming.
Roy
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John Houghton
Posts: 3487
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: PTGui 9.0.4. VP correction problem
Posted: 6 Jul 2011 at 16:51 GMT
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Roy, Without any evidence, it's difficult to speculate on the possible cause of the failure to optimize correctly. I have had the occasional problem like this and several attempts can be necessary to get the nadir properly aligned. I think it helps to have fewer rather than more control points, and manually reset the VP parameters on the Image Parameters tab before retrying the optimize with the image in a slightly different position.
John
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Skridlov
Posts: 232
Location: United Kingdom
Registered: 12 Nov 2007
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Re: PTGui 9.0.4. VP correction problem
Posted: 6 Jul 2011 at 17:18 GMT
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Thank you John.
I tried to edit the post above but I was prevented from either previewing or saving the changes. A complete start from scratch recovered this, however en route I encountered a few oddities - like the optimiser reporting good results but the vpc stitch still bad. Having just updated the program I jumped to the premature assumption that it might be a bug...
Meanwhile given the plethora of (to me) not terribly interesting changes and additions to recent versions of PTGui I just wish that it was better at automatic control point generation. It gets wearisome having to add them in the upper and lower 25% (guess) of each pair even when there's plenty of well defined detail present.
And whilst I'm complaining, I notice that EnfuseGui still can't cope with (ie throw away) the embedded thumbnails in tif files generated from Nikon NEFs. Not that it seems to cause much of a problem...
Roy
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Hans Nyberg
Posts: 2791
Location: Denmark
Registered: 28 Aug 2005
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Peter Farrington
Posts: 113
Location: Lowestoft, United Kingdom
Registered: 3 Jun 2010
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Re: PTGui 9.0.4. VP correction problem
Posted: 7 Jul 2011 at 9:16 GMT
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There's a PTGui VP Tutorial here:
www.ptgui.com/examples/vptutorial.html
Clearing these parameters is mentioned right at the bottom of the page - titled 'Troubleshooting'.
Regards,
Peter
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