6G-XR

The ExCalibAR project implements a comprehensive, easy-to-use pipeline for intrinsic and extrinsic calibration of setups with multiple light field cameras by utilizing Structure from Motion (SfM). The proposed method allows non-expert users to get reliable and swift calibrations by following an easy-to-understand process without requiring precise calibration targets.
In contrast, calibrating light field cameras and other multi-camera setups following state-of-the-art methods can be daunting for laypeople as it relies on multiple steps with many pitfalls and requires accurate calibration targets for which the exact geometry must be known.

Our method starts with uncalibrated cameras and no prior knowledge. It relies on the principle of Structure from Motion (SfM), which uses images of a static 3D scene to estimate the intrinsic and extrinsic parameters of the camera(s) and furthermore obtains the 3D geometry of the scene as a byproduct.

During the calibration process, a simple 2D marker is sufficient to achieve a metric scale reconstruction if the user desires.