chambers are flipped 90 degrees

hello, I have this strange problem.
I did the survey of a facade of a large house without problems and then I had to scan the lower part that cannot be scanned down to the ground due to vertical obstacles (plants, fence).
To do this lower part, I simply used the last useful safety height and made 3 horizontal flights, all at the same altitude, but I change the inclination of the camera in order to cover the lower part of the wall.
The reconstructed model is right … but it is reconstructed vertically.
I also notice that the chambers are flipped 90 degrees.
Anyone have any idea what may have happened?
thank’s in advance for the support.
Mario


Hi Mario,

Thank you very much for sharing your question.
When facing this issue, I will probably try:

  1. Use All prior in the Camera Optimization of step 1. You can find it under the calibration tab in step 1 > Calibration > Camera Optimization > Internal Parameters Optimization> All Prior. All Prior forces the optimal internal parameters to be close to the initial values.

  2. Adding the Manual Tie Points (MTPs). For more information, feel free to look at the explanation here. https://support.pix4d.com/hc/en-us/articles/202560349-How-to-add-import-and-mark-manual-tie-points-MTPs-in-the-rayCloud

  3. Try to orient the model by using orientation constraints. You can find the option under the rayCloud tab called “New Orientation Constraints.”
    You can find step-by-step instructions here: https://support.pix4d.com/hc/en-us/articles/205360385.

  4. If those mentioned above are unhelpful, you may try importing the GCPs could help (i.e., in the GCP/MTP Manager) the project and then reoptimize (under the process tab, click the first one “reoptimize”). If the problem continues, I will check if the coordinates of GCPs are in the correct order. i.e., X, Y, Z or Y, X, Z. However, please keep in mind that if GCPs are not available, this method means you may have to go to the field, position GCPs and measure them, and fly again.

I hope this helps! Feel free to keep us posted! Thank you very much.

Best regards,
Rosana