Abstract
Placement of custom corrective lens inserts within an optical path of head-mounted display cameras introduces uncalibrated optical distortion, invalidating factory calibration models. Because user-specific lenses vary and are installed post-manufacturing, pre-calibration during production is unfeasible.
A method for updating camera calibration parameters during operation is disclosed. Physical and optical parameters are registered into software to construct a parametric three-dimensional lens model in camera coordinate space. Light rays generated from initial camera intrinsics are projected through the three-dimensional lens model via Snell's law refraction calculations. Refracted light rays and associated sensor pixels are utilized to compute an updated camera distortion model.
The updated camera model establishes a canonical baseline for downstream geometric processing without physical hardware modifications. Removal of the corrective lens restores original factory calibration parameters.
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Maurino, Sebastian Lopez; Szostak, Haven; and Balzerson, Daniel David Albin, "Online Camera Calibration via 3D Ray Tracing Through Parametric Lens Models", Technical Disclosure Commons, ()
https://www.tdcommons.org/dpubs_series/12883