Splitting into chunks

[eiscar]

Hi,

I have a large project with images coming from different sources. I process all the images together and would now like to move each set of images into a different chunk keeping their alignment and sparse pointcloud information.  I am currently achieving this by generating copies of the large, source chunk for each group of images and then removing  all images that are not in a given set from it. This works fine for smaller projects, but for larger projects just copying the chunk takes more than 5 minutes per set, and there are many...

Is there any more efficient way to accomplish what I want?

Thanks a lot,

Best,
Eduardo 

[Alexey Pasumansky]

Hello Eduardo,

Maybe it will be faster if you remove unwanted cameras from the original chunk, save project under a different name, then re-open the original project and repeat the operation.
If you follow this approach via GUI, I suggest to keep the back-up copy of the source project to avoid accidental re-saving the project under the same name.

[eiscar]

Thank you for the suggestion, I will give it a try and report back.

As a follow up, I would also like to know how coordinates of camera positions are affected when images are removed from the chunk. As I mentioned in the previous post, I import a large number of images and then just align them. After alignment I would like to split them into chunks, but keeping their relative coordinates to each other, such that if I was to merge them again they would appear in the correct locations.  From my experiments so far it seems like the frame of reference is a different one for all the chunks I generate. Is there a way around this?

Best,
Eduardo

[Alexey Pasumansky]

Hello Eduardo,

The relative orientation of the cameras wouldn't change (unless you optimize the alignment for the edited subset), but absolute coordinates may change, due to the different referencing information.

[eiscar]

Exactly, that is what I have seen, and I would like to have the absolute coordinates be with respect to the same frame of reference for all chunks. Can I somehow set a coordinate system up in the original chunk and have all the copies keep the cameras coordinates wrt to it?