Auto calibrating a single camera from detectable objects

A method for automatically calibrating a camera, said method comprising:

• identifying, from within an image, an object of a particular type, said identifying includes identifying a first set of key points of the object;
• generating a virtual object of the same particular type as the object, the virtual object being associated with a second set of key points;
• fitting a reprojected version of the second set of key points to the first set of key points in two-dimensional (2D) space to form a fitted alignment between the first set of key points and the second set of key points;
• identifying reprojection parameters associated with the fitted alignment between the first set of key points and the second set of key points;
• and
• using the reprojection parameters to calibrate a camera that generated the image.

A method for automatically calibrating a camera, said method comprising:

• identifying, from within an image, an object of a particular type, said identifying includes identifying a first set of key points of the object;
• generating a virtual object of the same particular type as the object, the virtual object being associated with a second set of key points;
• fitting a reprojected version of the second set of key points to the first set of key points in two-dimensional (2D) space to form a fitted alignment between the first set of key points and the second set of key points;
• identifying reprojection parameters associated with the fitted alignment between the first set of key points and the second set of key points;
• and
• using the reprojection parameters to calibrate a camera that generated the image, wherein the reprojection parameters include one or more of:
• height of the camera, a tilt angle of the camera, a focal length of the camera, and a distortion matrix of the camera.