While marker based AR has seen widespread adaptation on mobile platforms due
to the simplicity of its implementation, it still struggles with bad user experience
due to the fact that users usually have to print cumbersome markers to enjoy the
AR experience. As the hardware in mobile phones have improved substantially
in recent years, it has opened up for a new kind of AR: Markerless AR. This
technology builds on the principle of natural feature tracking, which means that
the device creates a visual understanding of an environment it had no previous
knowledge of. This allows for new forms of AR applications where digital images
are placed and aligned straight into the real environment without the need for
physical markers.