Forum : Advice & Critiques

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Topic: Different results with 360 degree synths

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jankenbruck (Over 1 year ago)
Hi, I'm using Photosynth for Windows (v2.110.317.1042).  When goofing off just testing it out in the living room the results were stunning!  However, on a recent trip to Germany, I took extra care to take photos I thought would result in a good synth, but the results are choppy, meaning the whole synth doesn't show like the living room synth does.  Here are the links, hopefully you'll see what I mean.

Living room:
http://photosynth.net/view.aspx?cid=6dba8256-caf8-4052-aa82-893042ea5e1d

Cathedral:
http://photosynth.net/view.aspx?cid=e757ca64-b28a-47e7-a859-633ab4dcf582

Unfortunately, this is one of those once in a lifetime sights, and I only have the pics I took.  No way of going back!  Can anyone offer some insight?
jankenbruck (Over 1 year ago)
Nevermind! I figured it out.  For anyone who is curious ... the 360 degree panoramas must be done in Microsoft ICE (at least as far as I can tell).  After it's finished crunching all its numbers and stitching, click the "upload to web" button that has the Photosynth icon.  For some reason, Photosynth itself just doesn't offer this type of 360 panorama.  It only results in the choppy, individual photos that you have to click on to navigate around the room.
Nathanael (Over 1 year ago)
Hi, jankenbruck, 

Yes, Photosynth.net is currently host to two different imagery types: 
1: Photosynths
2: Panoramas 
(More to come http://bit.ly/spinmovies )

Panoramas are not photosynths and are not meant to be. 
An excellent panorama is one where the center of your camera's lens does not change its latitude, longitude, or altitude between input shots. This means that the foreground objects will line up with the background objects at the same spot in overlapping shots. This is important because panorama stitching is only 2D stitching. 

When a foreground object lines up with the background two or more different ways in two or more different input photos, a panorama stitcher will have to make a decision about the conflict and that automated decision is very nearly always wrong. 

The beauty and strength of a panorama is that it is a continuous, seamless view.
Nathanael (Over 1 year ago)
Likewise, photosynths are not panoramas, nor are they meant to be. 

A photosynth is a way of taking many photos of the same object or scene from many angles and automatically solving for both the structure of the subject matter and the camera positions from the different photos, relative to each other and the subject matter. 

In other words, the purpose of a photosynth is to afford you the ability to move between multiple points of view as though you were actually standing on location (rather than viewing a simple slideshow) and secondly, generating a basic 3D model of an object or place which other photos can then be matched against. 

The Silverlight photosynth viewer may be choppy, it's true, but the original Direct3D viewer is considerably smoother. You can use it in Internet Explorer (look for the link in the lower left corner of any synth's (not pano's) view page.
Nathanael (Over 1 year ago)
Similarly, for panoramas, you will find ICE's default panorama viewer, HDView ( http://bit.ly/msrhdview ) to be considerably superior to the Silverlight panorama viewer found on Photosynth.net. 

...

Many people seem to consider panoramas and photosynths to be in competition with each other, however, in reality, a panorama is just another photo which can then be organized spatially, Photosynth style. 

Although there is not yet a way on the website to insert a 360 degree panorama into a photosynth or link multiple panoramas together into a synth, it is being worked toward. You can see a preview from 2011 at http://bit.ly/readwriteworld
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