Forum : Advice & Critiques

Can’t seem to get something to synth right? Curious about what lens is best? Ask your fellow Photosynthers here.


Topic: Why won't it go all the way round?

Report Abuse Report Abuse
RPJ (Over 1 year ago)
This is a link to a 360 degree panorama. There is an overlap of images at each 'end' but you cannot go all the way round. Why is this? I thought this was one of the things Photosynth was supposed to do?

http://photosynth.net/view.aspx?cid=a6b21b66-83a2-4240-a48e-37b9463ceb37

Thanks. RPJ
Nathanael (Over 1 year ago)
This seems to be the trouble image: 
http://photosynth.net/view.aspx?cid=a6b21b66-83a2-4240-a48e-37b9463ceb37&m=false&i=0:2:14

Photosynth simply didn't make the connection between it and this image: 
http://photosynth.net/view.aspx?cid=a6b21b66-83a2-4240-a48e-37b9463ceb37&m=false&i=0:3:7

If I had access to your photos, I think I might try to make a stitch of those two photos and make a new version of the synth which included the stitch alongside all of the original photos from the current version. Hopefully that would be enough to bridge the gap.

I notice that you've also tried your hand at using ICE to make a panorama from your photos here: 
http://photosynth.net/view.aspx?cid=dfbba7e6-045a-4398-b0e6-1866f5813845 
and honestly, this is much better for your particular photos, since they were shot to be a panorama. I was slightly disappointed that although ICE appears to have solved the photos as a 360 degree panorama, it loads as a flat image for me.
Nathanael (Over 1 year ago)
I noticed that you commented on your panorama that it was created with a new version of Photosynth and that the old version is still on the site. This is a bit of a sore point for me, but hopefully I can explain without stepping on your toes.

Just to clarify, Photosynth was honestly never meant to be a panorama stitcher in the way that ICE is (ICE already existed before Photosynth). 

To make a good panorama, your camera's lens shouldn't be moving except to pivot around your camera's imaging plane. If your camera's lens does move, then you will get artifacts in your panorama, especially as things get closer to the camera. ICE will give you better results the more you constrain your camera to one position.

By contrast, if your camera's position fails to move around objects in the scene much, Photosynth will not be able to solve very well at all for the structure of the scene. Photosynth actually does better the *more* you move all the way around objects.
Nathanael (Over 1 year ago)
To sum up: 

1) For panoramas, Photosynth is no substitute for real panorama stitchers like ICE. 
Panoramas should always be shot from one position.

2) For fitting photos in 3D space, no panorama stitcher does what Photosynth does. 
Photosynths should always be shot from as many different positions as possible.
You need to be Signed In to add a comment. (Are you new? Sign Up for a free account.)