As software becomes increasingly sophisticated, the ability to detect facial landmarks opens the door to a number of promising and incredibly interesting applications. This is the process by which numerous points of interest are identified within images of human faces. It allows programs to detect specific facial emotions via the direction of the gaze and the movement of surrounding structures. It can be found in face-swapping application, and in programs that augment or enhance faces via the addition of graphics. When people use filters on social networking sites, it is the identification of landmarks and the replacement of such that makes face swapping possible. In fact, all facial recognition tools are heavily reliant upon this particular capability. Applications such as these can be found in the web-camera programs of tablets, laptops, and PCs, as well as on many advanced smartphones.