Morten Andersen
Posts: 60
Location: Roskilde, Denmark
Registered: 12 Jun 2006
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PTgui - preview and stitched not the same
Posted: 12 Jul 2008 at 9:28 GMT
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Hello everybody.
Today I discovered a new problem using PTgui.
I set up a project in PTgui. Before creating the panorama I always preview it - just to check if everything is ok.
Here is an extract from the preview:
As you can see it looks fine. There are some small stitching errors, but they are correctable in Photoshop.
After previewing I create the panorama. But looking at the created panorama it now looks like this:
Can anybody explain this strange behaviour?
Best regards
Morten
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John Houghton
Posts: 2265
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: PTgui - preview and stitched not the same
Posted: 12 Jul 2008 at 10:56 GMT
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The Panorama Editor does not show a completely accurate preview of the final image. PTGui takes shortcuts when warping the images so that the composite image can be generated sufficiently rapidly. Moreover, it doesn't blend the images as they might be by Smartblend, Enblend, or PTGui. In the case of your sample pictures, what has happened is the blender has ignored the zenith shot, because there was already full coverage provided by the horizontal shots. This is typical of Smartblend and Enblend.
PTGui Pro has a Blend Priority feature on the Image Parameters tab, which can be used to control how images get blended. In your dining rooom pano, a PTGui blended version does include the zenith despite there not being a hole left by the horizontal shots. If you have the Pro version, try blending with PTGui.
John
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Doug Aurand
Posts: 711
Location: Albuquerque, NM, United States
Registered: 2 Jan 2008
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Re: PTgui - preview and stitched not the same
Posted: 12 Jul 2008 at 14:55 GMT
updated: 12 Jul 2008 at 14:56 GMT
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Morton
Do you have FSPViewer?
What I've done is render the scene in PTGui, keep the program and project open, minimize them and open the stitched image with FSPViewer.
The if I have any problems, I can just maximize PTGui again and continue with some more work on the image.
Its free, here's the link
www.fsoft.it/panorama/FSPViewer.htm
Doug Aurand
Albuquerque, NM
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John Houghton
Posts: 2265
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: PTgui - preview and stitched not the same
Posted: 12 Jul 2008 at 16:03 GMT
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Doug Aurand said: What I've done is render the scene in PTGui, keep the program and project open, minimize them and open the stitched image with FSPViewer.
Doug, If you specify FSPViewer in Tools->Options as the viewer to be used for equirectangular files, you can use the View button near the file name field on the Generate Panorama tab to display the panorama. No need to minimize or run FSPViewer separately.
John
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Doug Aurand
Posts: 711
Location: Albuquerque, NM, United States
Registered: 2 Jan 2008
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Re: PTgui - preview and stitched not the same
Posted: 12 Jul 2008 at 16:20 GMT
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John
Thanx. I forgot I could set it up as a Tool.
Do you have a "tutorial" on what you think should be "added" to PTGui when setting it up and where to get them
Like FSPViewer, Enblend, Smart Blend, etc
I know for guys like me who come from software that is "self-contained" the concept of setting up the tools takes a little getting used to.
Doug Aurand
Albuquerque, NM
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John Houghton
Posts: 2265
Location: Hitchin, United Kingdom
Registered: 17 Jan 2005
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Re: PTgui - preview and stitched not the same
Posted: 12 Jul 2008 at 16:48 GMT
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Doug, I don't know of a tutorial that deals specifically with how to set up PTGui and the various alternative stitchers, blenders, viewers, cp generators etc. My tutorial "360 VR Stitching with PTGui for beginners" does include some links and setup instructions for those I felt were of value to a beginner. These include FSPViewer and Smartblend. There's also the complication of what options are available on Mac, about which I know very little.
John
John
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Doug Aurand
Posts: 711
Location: Albuquerque, NM, United States
Registered: 2 Jan 2008
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Re: PTgui - preview and stitched not the same
Posted: 12 Jul 2008 at 16:59 GMT
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John
I've have to visit that tutorial when I start practicing with the Canon/Sigma setup again.
Thanx
Doug Aurand
Albuquerque, NM
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Morten Andersen
Posts: 60
Location: Roskilde, Denmark
Registered: 12 Jun 2006
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Re: PTgui - preview and stitched not the same
Posted: 13 Jul 2008 at 12:52 GMT
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Yahooooo........
It worked simply blending with PTgui. Thank you so much 
Best regards
Morten
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Philip Warner
Posts: 23
Location: Austin, United States
Registered: 14 Mar 2008
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Re: PTgui - preview and stitched not the same
Posted: 13 Jul 2008 at 14:17 GMT
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John Houghton said: My tutorial "360 VR Stitching with PTGui for beginners" does include some links and setup instructions for those I felt were of value to a beginner.
Thanks for your tutorials! I learned a lot from them and it helped me use PTGui more efficiently.
Phil
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