Stereo vision is an important component of real-world data capture for Physical AI, robotics, and multimodal learning.
However, capturing synchronized left and right images does not automatically guarantee accurate stereo geometry.
At Origin Data Lab, we have been evaluating the geometric consistency and calibration limitations of our stereo capture workflow.
In Technical Field Note #04, we examine five important aspects of stereo camera calibration.
A single average error value cannot fully describe calibration quality.
Examining the distribution of epipolar errors helps identify residual misalignment and potential geometric inconsistencies.
Calibration parameters must correspond to the actual image capture configuration.
Changes in resolution, cropping, or camera operating mode can affect whether existing calibration parameters remain applicable.
Geometric errors may vary across the image.
Evaluating performance at different field angles helps reveal limitations that might not be apparent from central image regions alone.
Wide-angle and fisheye camera systems require appropriate projection models.
Incorrect projection assumptions can introduce geometric errors even when the calibration process appears successful.
Small errors in camera orientation can affect stereo correspondence and rectification performance.
Sensitivity analysis helps clarify how calibration uncertainty influences downstream geometric measurements.
Reliable real-world datasets require more than raw video and sensor recordings.
They require:
Our evaluation does not imply that every calibration issue has been resolved. Instead, it documents the factors that must be understood and verified before making stronger quality claims.
Good real-world data is not just collected. It must be measured, verified, and documented.
The complete technical note includes actual evaluation figures and further discussion of calibration limitations.
Technical Field Note #04 — Stereo Calibration Verification
https://origindatalab.io/technical-field-notes/stereo-calibration-check.html Origin Data Lab
Custom Real-World Data Production for Physical AI & Robotics