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Author Topic: Insta360 building scan  (Read 7349 times)

metaman

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Insta360 building scan
« on: December 02, 2023, 02:37:15 AM »
hello!

I'm trying to scan a building using an insta360 One RS 1-inch 360 edition camera.
This has 2 fisheye lenses, and I'm using images from the front lens, taken at a height
of 3 meters, and at a distance of 2 to 3 meters apart. See one of
the example images below. (original resolution is higher). I calibrated the lens
using metashape's camera calibration tool. This works but the tool seems to skip
images, in which the calibration target comes right up to the edge of the image.
The target is only detected when it is more or less in the center of the image. The resulting
model captures the general shape of the building quite nicely, but the details look
a bit .. mangled. See attached image and this sketchfab model:


https://sketchfab.com/3d-models/building-with-insta360-one-rs-1-inch-360-edition-02edc7b21a9544f0bd84235d8f175602

Do you think this is a limitation of this type of lens (not as good as some dslr lenses)
or can the model be improved upon?

thnx !


wizprod

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Re: Insta360 building scan
« Reply #1 on: December 02, 2023, 06:40:22 PM »
Why not just use the Fisheye preset un Camera Calibration? What happens if you try?

Additionally, Metashape works well with full 360 deg images, maybe that could make it easier for you ?

metaman

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Re: Insta360 building scan
« Reply #2 on: December 02, 2023, 08:07:41 PM »
Hello!

Thnx for the suggestion. Yes I tried this to start with. But for some reason, the walls then appeard rounded, the entire building looked like an ellipse (seen from above). When I did the calibration, the walls looked straight, but like
I wrote, everything still looks a bit mangled..

metaman

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Re: Insta360 building scan
« Reply #3 on: December 04, 2023, 01:48:15 AM »
hello! in case someone is looking for an answer, I managed to get a much better result by splitting the camera group all in to separate cameras (ie one for each image). I read that this works better if the cam has image stabilization. I think the insta360 as some form of stabilization, so...

luisSeyfer

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Re: Insta360 building scan
« Reply #4 on: May 10, 2024, 10:12:29 AM »
Hi,
how did you calibrate? Could you share the *.xml?