Calibrating a one-dimensional coded light 3D acquisition system

摘要

A camera intrinsic calibration may be performed using an object geometry. An intrinsic camera matrix may then be recovered. A homography is fit between object and camera coordinate systems. View transformations are finally recovered.

主权项

1. A method comprising:
performing a system calibration for a one-dimensional coded light three-dimensional acquisition system by: using a coarse calibration to estimate system parameters; minimizing geometric reconstruction error including iterating until convergence of the following refinement sequence:
fixing all parameters except a lens distortion model to determine camera distortion;fixing all parameters except a 2×4 projection matrix PP to determine a projector matrix PP;fixing reconstructed points to determine an error function for an n-th view;fixing all parameters except parameters for a known planar calibration object and minimizing for a final bundle adjustment; refining RP and tP using the refinement sequence as the initial value and minimizing geometric error, where RP and tP are extrinsic rotation and translation parameters between the camera and projector coordinate system; and recovering KP, RP and tP from the projector matrix PP, where KP is a 2×3 intrinsic matrix.