Changes

Outside-in VR tracking's accuracy and performance are dependent on various factors like the quality of the optical sensors, tracking markers and targets, processing power, and tracking algorithms, all of which can vary greatly.<ref name=”2”></ref><ref name=”4”> Wang, J.F., Azuma, R., Bishop, G., Chi, V., Eyles, J. and Fuchs, H. (1990). Tracking a head-mounted display in a room-sized environment with head-mounted cameras. Proceedings of SPIE 1990 Technical Symposium on Optical Engineering and Photonics in Aerospace Sensing, Orlando, Florida</ref>

Outside-in VR tracking's accuracy and performance are dependent on various factors like the quality of the optical sensors, tracking markers and targets, processing power, and tracking algorithms, all of which can vary greatly.<ref name=”2”></ref><ref name=”4”> Wang, J.F., Azuma, R., Bishop, G., Chi, V., Eyles, J. and Fuchs, H. (1990). Tracking a head-mounted display in a room-sized environment with head-mounted cameras. Proceedings of SPIE 1990 Technical Symposium on Optical Engineering and Photonics in Aerospace Sensing, Orlando, Florida</ref>

Outside-in tracking using markers is a well-developed and researched technology. Indeed, a group of researchers (Pustka et al., 2012) built a positional tracking system of this kind using only unmodified off-the-shelf mobile phones. Also, an early two-camera tracking system was described by Madritsch and Gervautz in the year G1996, and a system that used synchronized IR cameras, able to distinguish 6D targets, was described by Dorfmüller in the year G1999.<ref name=”5”> Pustka, D., Hülb, J.P., Willneff, J., Pankratz, F., Huber, M. and Klinker, G. (2012). Optical Outside-In Tracking using Unmodified Mobile Phones. IEEE International Symposium on Mixed and Augmented Reality</ref>

Outside-in tracking using markers is a well-developed and researched technology. Indeed, a group of researchers (Pustka et al., 2012) built a positional tracking system of this kind using only unmodified off-the-shelf mobile phones. Also, an early two-camera tracking system was described by Madritsch and Gervautz in the year 1996, and a system that used synchronized IR cameras, able to distinguish 6D targets, was described by Dorfmüller in the year 1999.<ref name=”5”> Pustka, D., Hülb, J.P., Willneff, J., Pankratz, F., Huber, M. and Klinker, G. (2012). Optical Outside-In Tracking using Unmodified Mobile Phones. IEEE International Symposium on Mixed and Augmented Reality</ref>

The outside-in tracking system needs room calibration after the cameras or sensors are placed, and the data acquired by the system is processed on a computer.<ref name=”3”></ref><ref name=”5”></ref> Besides its application in VR, this type of tracking is used in motion capturing, as in the case of the film industry.<ref name=”2”></ref>

The outside-in tracking system needs room calibration after the cameras or sensors are placed, and the data acquired by the system is processed on a computer.<ref name=”3”></ref><ref name=”5”></ref> Besides its application in VR, this type of tracking is used in motion capturing, as in the case of the film industry.<ref name=”2”></ref>