 |
|
|
|
|
|
 |
| ||||||||
 |
 
|
|
|
|
|
|
|
|
|
| ||||||||
|
|
| 
| User list | Rules | You are not logged in.
Greetings!
I am having a little trouble in nailing down the reason that some of my outdoor 360° spherical pano's aren't coming out properly, the indoor ones always work out ok but the outdoor ones only seem to have a problem with the sky (zenith?) as the bottom (nadir?) always comes out ok.
After much research on here and trial and error I thought I had narrowed it down to the fact that on the ones that didn't work I had changed the exposure to compensate for the sky during the shot, that seemed to fit, however the attached pic shows two pics in which I didn't change the exposure or any of the other settings during the shot! one of them stitched together perfectly but the other one didn't, could this be due to the fact that in the first pic the sky lacked enough detail??
I am shooting with a pano maxx head
nodal point done
tripod bubbled
canon 5dmk 2
canon 17-40mm
10 shots at -30
10 shots at +30
two up shots
and two down shots
I have tried changing the settings in autopano, ie. force all pics to be in one pano, and changing the default projection, but the results aren't really satisfactory
help much appreciated!!
kind regards
Offline
midgely wrote:
Greetings!
I am having a little trouble in nailing down the reason that some of my outdoor 360° spherical pano's aren't coming out properly, the indoor ones always work out ok but the outdoor ones only seem to have a problem with the sky (zenith?) as the bottom (nadir?) always comes out ok.
After much research on here and trial and error I thought I had narrowed it down to the fact that on the ones that didn't work I had changed the exposure to compensate for the sky during the shot, that seemed to fit, however the attached pic shows two pics in which I didn't change the exposure or any of the other settings during the shot! one of them stitched together perfectly but the other one didn't, could this be due to the fact that in the first pic the sky lacked enough detail??
Quite likely.
I am shooting with a pano maxx head
nodal point done
tripod bubbled
canon 5dmk 2
canon 17-40mm
10 shots at -30
10 shots at +30
two up shots
and two down shots
Why did you choose to shoot 10-around? This database suggests that 8-around is sufficient:
http://www.vrwave.com/panoramic-lens-database/canon/
I have tried changing the settings in autopano, ie. force all pics to be in one pano, and changing the default projection, but the results aren't really satisfactory
If your shots lack sufficinet features for control point to be detected, then you could manually place them.
If, say, your 'featureless' zenith shot is shot at +90 pitch then just force it into the pano then manually set the Yaw/Pitch/Roll values for that image in the Panorama Editor and then hard link it.
Offline
Hi Mediavets,
Thans for your swift reply!
I will try it with 8 shots as the database says, thanks, 10 seemed to give me plenty of overlay between pics but if 8 works, great!
Thanks for the advice on forcing the picture into the panorama, I am not that au fait with the editor side of autopano but I will fiddle around with it and see if I can work it out!
in addition, does changing the settings mid shot, ie, exposure for the sky, affect the way autopano is able to stitch the panorama together drastically to the point of not being able to do it!
in the attached picture the only difference between the top panorama and the bottom one is that I changed the exposure settings during the shoot, everything else was the same, in fact they were taken on the beach on nearly identical groynes next to each other?
kind regards
Offline
Personally I am not a fan of using zenith shots outdoors. i rather do a row at +50 which will tie the sky to the horizon when using wide enough lens.
Offline
midgely wrote:
Hi Mediavets,
Thans for your swift reply!
I will try it with 8 shots as the database says, thanks, 10 seemed to give me plenty of overlay between pics but if 8 works, great!
25-30% overlap is desirable but beyond that excessive overlapping can cause stitching problems.
Thanks for the advice on forcing the picture into the panorama, I am not that au fait with the editor side of autopano but I will fiddle around with it and see if I can work it out!
It's a good idea to become familiar with teh Panorama Editor for those (many) occasions when you won't get perfect stitch automatically straight away.
The screenshot below illustrates editing a pitch value for a zenith image.
in addition, does changing the settings mid shot, ie, exposure for the sky, affect the way autopano is able to stitch the panorama together drastically to the point of not being able to do it!
That's possible. The conventional advice is to use the same exposure for all shots in a pano iof shooting one shot at each shooting position. If the scene has a very wide dynamic range you can shoot bracketed expsoures at each shooting position and then merge them later.
Last edited by mediavets (2012-12-19 13:52:49)
Offline
fantastic, thanks for your help with this, I am relatively new to autopano so just in the process of working through it, I have managed to put the pics in manually via the editor and it works fine now!
kind regards
Andy
Offline