A method of determining a head pose of a user by a sensing device, comprising: detecting a face of the user in an image captured by the sensing device; identifying a plurality of points in the image corresponding to respective features of the detected face, the plurality of points including at least a first point corresponding to a location of a first facial feature, a left eye, a right eye, a left portion of a mouth, and a right portion of the mouth, wherein the first facial feature is a nose and the remaining points correspond to locations of a mouth or eyes; and determining a position of the face relative to the sensing device based at least in part on a distance, wherein the determining comprises: calculating a first midpoint between the location of the left eye and the location of the right eye; calculating a second midpoint between the location of the left portion of the mouth and the location of the right portion of the mouth; calculating a third midpoint between the location of the left eye and the location of the left portion of the mouth; calculating a fourth midpoint between the location of the right eye and the location of the right portion of the mouth; calculating a first combined distance being a sum of the distances from the first point to each of the first midpoint and the second midpoint; calculating a second combined distance being a sum of the distances from the first point to each of the third midpoint and the fourth midpoint; and determining the distance of the face relative to the sensing device as a proportion of the greater of the first combined distance or the second combined distance. detecting a face of the user in an image captured by the sensing device; identifying a plurality of points in the image corresponding to respective features of the detected face, the plurality of points including at least a first point corresponding to a location of a first facial feature, a left eye, a right eye, a left portion of a mouth, and a right portion of the mouth, wherein the first facial feature is a nose and the remaining points correspond to locations of a mouth or eyes; and determining a position of the face relative to the sensing device based at least in part on a distance, wherein the determining comprises: calculating a first midpoint between the location of the left eye and the location of the right eye; calculating a second midpoint between the location of the left portion of the mouth and the location of the right portion of the mouth; calculating a third midpoint between the location of the left eye and the location of the left portion of the mouth; calculating a fourth midpoint between the location of the right eye and the location of the right portion of the mouth; calculating a first combined distance being a sum of the distances from the first point to each of the first midpoint and the second midpoint; calculating a second combined distance being a sum of the distances from the first point to each of the third midpoint and the fourth midpoint; and determining the distance of the face relative to the sensing device as a proportion of the greater of the first combined distance or the second combined distance. calculating a first midpoint between the location of the left eye and the location of the right eye; calculating a second midpoint between the location of the left portion of the mouth and the location of the right portion of the mouth; calculating a third midpoint between the location of the left eye and the location of the left portion of the mouth; calculating a fourth midpoint between the location of the right eye and the location of the right portion of the mouth; calculating a first combined distance being a sum of the distances from the first point to each of the first midpoint and the second midpoint; calculating a second combined distance being a sum of the distances from the first point to each of the third midpoint and the fourth midpoint; and determining the distance of the face relative to the sensing device as a proportion of the greater of the first combined distance or the second combined distance.