Human Subject Distance Estimation Using the Pupillary Distance and Head Orientation

In this article we propose a method to estimate the distance to the camera of a human subject from a monocular image without restricting the orientation of the head. The inter pupillary distance of the subject is used as anchor to estimate the size of pixels in the plane of the subject and the distance to the camera is recovered from this measurement. The inter pupillary distance in the image is e...