Forum : Technical Preview

Get all your questions answered about our latest Photosynth Technical Preview.


Topic: Fisheye Lenses For 360 Views

Report Abuse Report Abuse
GTP_Real_Estate (7 months ago)
Hi Synthers - I need to use a fisheye lenses for 360 views using 8 photos. Should I de-fish first - Will PS3D support Fisheye transforms?

Also would like to see the window player size in horizontal format as an option - not vertical like the source images.
 
Keep up the brilliant work!
GTP_Real_Estate (7 months ago)
OK - De-fishing works great - Still need a horizontal window. Awesomenessss!
NateLawrence (7 months ago)
Hi, Andre, I've been glad to see your uploads in the preview.

Matt (M with the AT) started a related discussion the week before last here: http://bit.ly/psfifpp

Just as a note, Photosynth is recommending shooting panorama style synths for the preview in landscape, rather than portrait for the very reason that they currently fit the aspect ratio of the viewer to the aspect ratio of the input photos (as well as the fact that for parallax panorama style synths you want to shoot 70% overlap for foreground objects' depths to be computed and cut out from the background as cleanly as possible and 70% overlap means fewer landscape shots than portrait shots).

Sources: 
1: Shooting Guide http://bit.ly/newphotosynthguide 
(Page 4 under Panorama tips) "Shoot in landscape mode, and at a wide focal length."
(Page 5 under Current Limitations) "Fish-eye lenses, other than Go-Pros, are not supported.”
NateLawrence (7 months ago)
2: Frequently Asked Questions: 
http://photosynth.net/preview/help#FAQ8 "Landscape mode works better than portrait mode, but stay in the same mode for a whole sequence."
http://photosynth.net/preview/help#FAQ12 "Shoot in landscape mode, and at a wide focal length. The Expert Shooting Guide explains in more detail about the different kinds of panoramas you can shoot."

3: (No mention of shooting landscape shots that I heard when I reviewed just now, but the desired overlap for parallax panos is mentioned.)
Video Tutorial: http://youtube.com/watch?v=a8vsQ5kYUXQ&hd=1&t=2m13s
Video Tour with David Gedye: http://channel9.msdn.com/posts/A-Photosynth-2-Overview-with-David-Gedye#time=16m29s
NateLawrence (7 months ago)
Having said this, the Photosynth team has said that in the future they plan to have stitched panoramas (from ICE, Photoshop plugin, Windows 8.1 camera app, mobile Photosynth apps) be viewable in their new WebGL viewer.
"We definitely are planning on fully supporting arbitrary resolution stitched panos in WebGL." http://bit.ly/psforiginaluploads

In early 2013 in a discussion on why mobile panoramas shot with Photosynth's current mobile apps are so low res, David Gedye suggested: 
"What do you guys think about a hybrid approach: Low res stitch on the phone, but upload full frames and get a hi res stitch done in the cloud a minute or so after upload?" http://bit.ly/psfhrp
NateLawrence (7 months ago)
Four weeks ago, Joscelin was comparing panoramic photos in PS1, ICE, + PS2. The Photosynth team wrote:
"I should say that frankly, we're of two minds about the pano capabilities in Photosynth 2 right now. If you have lots of parallax or you have people moving, Photosynth2 does a better job, but if you're an expert panorama shooter--and many users of Photosynth are--and you shoot without noticeable parallax, AND you choose your shots carefully to avoid cutting moving people in two, then stitched panos (via ICE) lead to a much wider field-of-view viewing experience, and people generally tend to prefer it.

In the future we hope to have our pipeline just "do the right thing": stitch when artifacts would be small, and project the photos when stitching would produce large artifacts." http://bit.ly/psfps2vi
NateLawrence (7 months ago)
In the discussion of Matt's that I linked to at the top, the Photosynth team wrote: 
"All those example panos would probably be better as "stitches", since there's no parallax to speak of. In the future we hope to have our backend automatically identify this and create a stitched experience when it makes sense, or the author explicitly requests this."

::

So, I think that in the future, since your aim is the wide view that a stitched panorama affords, you'll be one of those taking advantage of what is suggested by the Photosynth team in the above quotes.
NateLawrence (7 months ago)
I should have put this before the other quotes, but the Shooting Guide for the preview says: 

"The new Photosynth engine is not a stitcher, so while you can upload frames suitable for stitching in the new Photosynth technology we are previewing, you will get a photo-by-photo viewing experience, not a wide-angle stitch. What is truly compelling about panoramas in the new technology is that you can use parallax if you’re in the right location and you shoot correctly." ... "At present, you can’t control which type of panorama the Photosynth cloud processor creates. If it detects parallax in all of the frames, it will attempt to create a parallax panorama. If it doesn’t, you’ll get a flat panorama. We intend to make this more controllable in the future." ... "The new Photosynth has no equivalent yet to a full panoramic sphere where you can look up and down as well as left and right. Keep using our apps or Microsoft ICE if you want to capture the ceiling!"
NateLawrence (7 months ago)
Very loosely related discussions include: 
My wondering why the global camera view couldn't present geometry (point cloud, camera frusta, polygons that the photos are being projected on) filling the browser window: http://bit.ly/psfgvar
Matt's wondering why not extend the rendered amount beyond the photo borders when viewing Wall synths: http://bit.ly/psfwsar
GTP_Real_Estate (7 months ago)
Nate Thanks so much for the info - you rock! It's good to be back to Synthing ;)
GTP_Real_Estate (7 months ago)
RE: Vertical Fisheye - It's the only way my rig can be set up. Also I like the near - 180Vx360H field of view. Capturing horizontally would yield significantly less Vertical Field of View.
GTP_Real_Estate (7 months ago)
As in example below: This should be horizontal or the panorama effect is lost. http://actvra.in/49Fb#sthash.8TMa8Qzd.25U3ArXy.dpuf
You need to be Signed In to add a comment. (Are you new? Sign Up for a free account.)