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Author Topic: Depth maps after incremental photo alignment  (Read 1045 times)

beldridg

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Depth maps after incremental photo alignment
« on: December 12, 2022, 06:43:18 PM »
I'm running into some behavior that I think is unexpected. I'm using v 1.8 of the Standard version.

Let's say I align 100 photos and build a mesh which creates 100 depth maps.

Then I align an incremental 20 photos. If I then try to build a "new" model, it doesn't create the depth maps for the additional 20 photos or include them in a mesh.

I have Reuse depth maps enabled AND I don't change any of the parameters (e.g., quality, filtering, etc.).

The only workaround I have found is to basically delete all the existing depth maps and start over. If it was just 100 photos, I wouldn't really care, but it is 1000s of photos.

What am I doing wrong?


Thanks,

- brett

Alexey Pasumansky

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Re: Depth maps after incremental photo alignment
« Reply #1 on: December 12, 2022, 06:45:51 PM »
Hello Brett,

If you enable "reuse depth maps" option it means that the existing depth maps set will be used, i.e. the depth maps generation step will be completely skipped.
Best regards,
Alexey Pasumansky,
Agisoft LLC

beldridg

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Re: Depth maps after incremental photo alignment
« Reply #2 on: December 12, 2022, 07:40:10 PM »
Thanks, two follow-on questions:

1) If I un-check that option AND I already have some of the maps done, should it just process depth maps for the "new" aligned photos?

2) I have one project where I have 3,404 photos aligned but only 3,377 depth maps were created. What would cause a depth map to not be created for a photo that is aligned? I re-checked that the region included all photos.

- brett

Alexey Pasumansky

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Re: Depth maps after incremental photo alignment
« Reply #3 on: December 12, 2022, 08:14:13 PM »
Hello Brett,

Currently there are only two options:
1. Re-use existing depth maps and therefore skip the depth maps generation stage.
2. Discard existing depth maps and start the depth maps estimation procedure from scratch.

It is not possible to build the depth maps only for newly aligned photos, as some of pre-aligned photos should also have the depth maps re-built, if they overlap with the newly added photos. At least not possible in a straight-forward way, without sophisticated workarounds with Python scripting.
Best regards,
Alexey Pasumansky,
Agisoft LLC

beldridg

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Re: Depth maps after incremental photo alignment
« Reply #4 on: December 12, 2022, 08:36:39 PM »
Okay, thanks, understood.

Any thoughts on the other question?

If I start from scratch and re-generate all depth maps, what reasons would cause there to be fewer depth maps than aligned photos?

- brett