A vision-based head tracker for fish tank virtual reality-VR without head gear

A practical and robust head-position tracking method using computer vision is presented. By combining two simple image processing techniques, this tracker can, report the position of the user´s head in real time. Whole image processing is performed by software running on normal mid-range workstations. This tracker can support desk top virtual reality (also referred to as “fish tank VR”), thereby enabling a user to use a wide range of 3D systems Without having to the on any equipment. An experiment conducted by the author suggests this tracker can improve the human´s ability in understanding complex 3D structures presented on the display