How to use your nose as a mouse

This technique for using one’s nose, described publicly in 2004, has yet to catch on in a major way:

Nouse ‘Use your nose as a mouse’ perceptual vision technology for hands-free games and interfaces,” Dmitry O. Gorodnichy and Gerhard Roth, Image and Vision Computing, vol. 22, no. 12, 2004, pp.  931-942. The authors write:

“The described techniques for tracking a face using a convex-shape nose feature as well as for face-tracking with two off-theshelf cameras allow one to track faces robustly and precisely in both 2D and 3D with low resolution cameras. Supplemented by the mechanism for detecting multiple eye blinks, this technology provides a complete solution for building intelligent hands-free input devices. The theory behind the technology is presented…. It should be noted that the convex-shape nose feature is not associated with a physical point on a nose. Instead, it is associated with the extremum of the nose curvature, which moves on the nose surface.”

Here’s detail from the paper: