Forum : Advice & Critiques

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Topic: Panoramic synth weirdness on viewing

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peetucket (Over 1 year ago)
Hi all,

I recently uploaded a series of 7 photos taken as a panorama of St. John's Harbor, Newfoundland.  It was 100% synthy.  When I view the synth and pan from right TO left, it moves from photo to photo exactly as expected, but when I pan from left TO right, it stops after photo #2.  Zooming in and out doesn't work either.  Only by futzing with the next buttons can I get it to "skip" to photo #3.  This happened with a second synth I uploaded too.  Any ideas?

http://photosynth.net/view.aspx?cid=06ee32bb-6ba9-4de3-af0c-98cc0bcce2eb
pope_luke (Over 1 year ago)
If you take a look at your photos in the grid view, you'll see that the problem photo (the one with mostly water, and then green grass on the left side) is a lot darker than the photo that it is linking into. I'm not expert, but I would suggest brightening up that photo with some photo editing software. You should check that photo against the others to see that the light levels for all photos are generally the same. 
Try messing with the brightness levels and then resynthing your project. I have a feeling it might help. 
Don't forget to make a copy of your old photos before you start, though. Sometimes you can overdo it and find that it's synthing worse than before. I've had my far share of that.
madeeds (Over 1 year ago)
Photosynth will be much happier if you can overlap your photos more.  It's optimized for reconstructing a 3D scene, not creating a panorama.  You should have about 60% overlap between photos for a great synth.  Every point should be in 3 photos.  It looks like about half the points are in two photos in your panorama.

The issue you are seeing here is that left and right are not transitive.  In a panorama it is possible for these to be transitive, but in the more complicated spaces created in larger synths this isn't possible, so the software doesn't do anything to try to garantee this.
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