AUTOMATED CALIBRATION OF REFERENCE FRAME OF AUGMENTED REALITY Russian patent published in 2018 - IPC G06T15/00 

FIELD: means of augmented reality.

SUBSTANCE: invention relates to augmented reality. Method comprises: receiving or setting a coordinate frame by a tracking system, associated with an object tracking system, the tracking system coordinate frame is connected with a real three-dimensional space and the tracking system tracks the position and orientation of a camera in real three-dimensional space, which captures the real three-dimensional space and a printed marker; wherein reception of a camera's reference system from the tracking system, the camera's reference system shows the position and orientation of the camera in the tracking systems coordinate frame; receiving or setting the coordinate system data of the printed marker associated with a printed marker, coordinate system of the printed marker is associated with the real three-dimensional space, and the coordinate system of the printed marker is connected with the coordinate system of the tracking system; determination of the origin of a printed marker by calculating the centroid of three or more non-collinear points of a printed marker; defining a camera lens reference frame, the camera lens reference frame shows the position and orientation of the camera lens in the coordinate system of the printed marker; conversion of the coordinates of the camera lens between the camera reference system and the camera lens reference system, transformation of the coordinates of the camera lens includes a conversion matrix providing a conversion between the camera reference system and the camera lens reference system; and output to the screen augmented scene, including the form of a real three-dimensional space and one or more virtual elements, the transformation of the coordinates of the camera lens is used to change or distort one or more virtual elements in the augmented scene.

EFFECT: technical result is to ensure a fast and accurate alignment between virtual content and a type of scene from the live camera.

12 cl, 18 dwg