Is the optimization currently active?

Add a new point to the line.

Reset the line to contain only the points in the given vector.

Build the optimization problem in Ceres.

Entry point for background solver thread.

Start optimization thread to modify intrinsic / extrinsic parameters.

Construct empty calibration object.

\brief dGravity_dDirection Returns the jacobian associated with getting the 3d gravity vector from the 2d direction \param direction The 2d gravity di

Ceres callback after every iteration.

Set the size of the boxcar window */