Camera matching for LVIA

[Macker]

Hi all,

I'm sure a fair few of the people on these forums have experience in camera matching, as do I - but I'm after some advise on a fairly niche camera match.

I'm currently in the process of producing some images for an LVIA (landscape visual impact assessment), which are sometimes known as EIA (Environmental impact assessment). We have photos that have to be stitched together to form a cylindrical projection, which is no problem as Photoshop or Hugin (my preference) can do this. The issue is how to camera match to this?

Perhaps I am going about it wrong - perhaps I should be creating an rectilinear (or other?) projection, matching that, and then converting to cylindrical?

Or is it best to individually match the photos, and then stitch them together afterwards?

I know plenty of other people do this, so I'd be keen do hear their workflows.

Screenshot attached showing the type of thing I'm talking about.


Thanks in advance. Any help is much appreciated.
Chris

[vladimir_krastev]

HI, thanks for posting.

Or is it best to individually match the photos, and then stitch them together afterwards?

This would be my first choice but there could be more efficient way.

Please check these threads as well:
https://forums.chaos.com/forum/v-ray...ng-to-panorama
https://forums.chaos.com/forum/v-ray...48-pano-images
https://forums.chaos.com/forum/v-ray...ching-panorama

[philip kelly]

The individual way is probably the most accurate, and that's what you are after.
So set up the camera as the shots were taken.
If your doing it again, get a tripod head with printed degrees on it and set it to 15 deg intervals and take your shots.
Then back at the desk, set up your cameras the same way Vertical most likely for wide panoramic views , and if a full frame camera was used then they should match.

https://www.amazon.co.uk/Neewer-Pano...a-815595478745


Might be a digital version now. But make sure you write down your method and make it your company policy to accurately do this type of work.

[Neilg]

The preview of the stitch you've done is nowhere near accurate enough to match a camera to - if you were going to match a vray render to a stitch, you'd need it to stitch a perfect replication of the equivalent of a spherical/fisheye lens. You've got seams all over that and the horizon isnt straight.
Spherical is possible, and I do it on most projects, but your photography and stitching needs to be flawless.

[Macker]

The preview of the stitch you've done is nowhere near accurate enough to match a camera to - if you were going to match a vray render to a stitch, you'd need it to stitch a perfect replication of the equivalent of a spherical/fisheye lens. You've got seams all over that and the horizon isnt straight.
Spherical is possible, and I do it on most projects, but your photography and stitching needs to be flawless.

I have no doubt - but the photography wasn't by me, i'm afraid. Also worth mentioning, that is a viewport preview in Hugin, not the final stitch.