Trailer height and hitch ball calculation

A method for identifying a position of a coupler interface between a vehicle and a trailer:

• maneuvering the vehicle varying a trailer angle between the vehicle and the trailer;
• capturing image data depicting a marker positioned on a trailer in a field of view at a plurality of trailer angles;
• detecting the marker in the image data at each of the plurality of trailer angles;
• and
• identifying a coupler position of a coupling interface of the trailer based on a marker position of the characteristic marker at each of the plurality of trailer angles.

A towing assist system for a vehicle comprising:

• a marker positioned on a trailer, wherein the marker is affixed to the trailer within the field of view in an indeterminate location relative to a coupler position;
• an imaging device in connection with the vehicle and configured to capture image data demonstrating the marker in a rearward-directed field of view;
• and
• a controller that:
• processes the image data depicting the characteristic marker;
• detects the marker in the image data at each of the plurality of trailer angles;
• determines a plurality of marker positions of the marker in the image data at the plurality of trailer angles;
• and
• identifies the coupler position of a coupling interface of the trailer to the vehicle based on marker positions at the plurality of trailer angles.