Problem with Distance Constraint Error in RealityCapture

Hello everyone,

I am currently working on a 3D model using RealityCapture with oblique aerial photos captured by my DJI Mini 3 Pro drone. Here is the issue I’m encountering:

After importing the photos, aligning the images, and successfully adding two control points (accurately marked on over 20 images each with reprojection errors of less than 0.5 pixels), I proceeded to define a distance constraint between these two control points. The real-world distance between these points is 28 meters.

However, after entering this value, the software displays the calculated distance as 29.5769 meters and shows an error message: “There are some errors in the defined constraints.”

Steps Taken:

  1. I ensured the control points were accurately placed and had low reprojection errors (~0.3–0.4 pixels).
  2. I entered the real-world distance (28 meters) in the “Define Distance” window.
  3. After defining the distance, I clicked the “Update” button in the “Alignment” toolbar, but the error message persisted.

To help clarify the issue, I have prepared a screenshot of the program interface showing the error message, which I will attach to this post.

Has anyone encountered a similar problem or could provide guidance on how to address this issue?

Thank you in advance for your assistance!

Best regards.

Hello cly24111
Try to make a new alignment instead of update. If that doesn’t work, turn off the camera priors for all images and then align the component again.
This is happening because drone’s GPS is not so precise.