Can I use calibration by DLTdv in Caliscope?

[DracLine]

Caliscope is a very intriguing instrument. However, using ChArUco board for calibration is wildly inconvenient in our setup. Traditionally, we used DLTdv to calculate calibration coefficients for our cameras. Given that DLTdv produces 9 parameters, it follows that some or all of them might be the same that Caliscope calculates during the calibration step.
My question is - can I somehow import DLTdv calibration into Caliscope and, omitting the internal calibration step, use those during 3D pose estimation?

[mprib]

Thank you for your question and for making me aware of DLTdv. Poking around on the website of the Hedrick lab it seems as though the calibration is done with a wand: https://biomech.web.unc.edu/wand-calibration-tools/

I'm guessing that this is particularly useful in outdoor/large spaces where the capture volume is not continuous with the floor? Or in small scale settings where creating a tiny charuco would be challenging. I'd be curious to learn more about your use-case if you feel comfortable sharing it.

In Caliscope, each camera has 15 parameters:

• 4 intrinsics to represent the classic pinhole camera model
  • Focal length (x,y) and focal center (x,y)
• 5 parameters for distortion
• 3 parameters for translation
• 3 parameters for rotation

So I'm not sure that the rotation/translation values are known in those 9 parameters you are getting form DLTdv, but I could be wrong. Those are absolutely necessary for the triangulation.

Just to explain the core benefit of the charuco: it resolves ambiguities about relative rotation (a checkerboard could be rotated 180 degrees and you'd never know). I have no doubt there are strategies to resolve this ambiguity, but it's not quite clear to me how to go about that in a good way. If you have any ideas, I'm all ears.