Undesired behavior when calibrating cameras

PIX4Dmapper PIX4Dmapper Questions/Troubleshooting
1

Background:
We are trying to evaluate Pix4D to generate Orthomosaics of images taken of the seabed underwater with autonomous underwater vehicles. For each image the position and altitude is embedded and the navigation accuracy of our vehicle is extremely accurate, so the task should be as simple as “overlaying” the images. I have more than 90% overlap in each image and good detailed conditions.

Current situation:
When I try to process a set of images the calibration process completely skews the image positions, puts them at different altitudes, rotations and positions. I do not understand why this is even possible when all needed information regarding positions of the images is already embedded in the images. 
See the two included images for reference.

I hope someone has the expertise to help m e with this.

2

Hi Jesper. Very cool application. You could likely improve the results by altering some of the step 1 calibration parameters. Specifically, I would try enabling geometrically verified matching, setting the calibration method to “accurate geolocation and orientation” and you could even set external parameter optimization to “None”. 

These would be the first changes I would try. If you continue to have issues you may want to submit a support ticket with the quality report to allow for more in-depth analysis. 

Good Luck!