Visual hull

A visual hull is a geometric entity created by shape-from-silhouette 3D reconstruction technique introduced by A. Laurentini.

The intersection of the two cones is called a visual hull,[1] which is a bounding geometry of the actual 3D object (see the bottom right thumbnail).

[2] A technique used in some modern touchscreen devices employs cameras placed in the corners situated opposite infrared LEDs.

[citation needed] Visual hull generation method has also been used within experimental tele-meeting systems[3] that aim to allow a user in a remote location to interact with virtual objects.

The method uses multiple cameras to capture the real-world movements and interactions of the "sender", employing hardware-accelerated volumetric visual hull representation to create 3D volume from 2D multi-view images.