Today, many virtual reality headsets are being developed. Each has its own characteristics and special abilities. The HTC Vive and the Gameface, for instance, take advantage of Valve´s Lighthouse technology to track your position exactly. Thus you’re free to move around in a certain area. Starbreeze’ StarVR offers a 210 degree field of view, covering almost evering you can perceive, whereas the FOVE tracks where you’re looking at to control the action. Project Morpheus works together with a PS4, and thus will be running for a reasonable price. Use the following specifications table to compare the different VR headsets.
VR terms explained
Field of view
The field of view (FOV) describes the extent of what can be seen by using a VR headset. With eye movement, humans usally are capable of noticing approximately 270 degrees. A FOV of 100° may already be enough to “believe” digital VR worlds being real.
Head tracking and positional tracking
Head tracking refers to the rotation of your head, whereas positional tracking registers the exact position of the headset. A variety of sensors like gyroscopes and accelerometers are needed to enable head tracking, whereas positional tracking can be done by IR cameras for instance. Usually, better VR headsets are tracking your head in six dimensions (six degrees of freedom – 6DOF): limited movement (forward/backward, up/down, left/right) and rotation of the three axes pitch, yaw and roll. Thus you’re able to freely look around in digital VR worlds and even move your head a little forward/backward, etc. As mentioned in the beginning, some VR headsets are even able to track their position over a larger area. Thereby you’re able to walk around in digital VR worlds. For more information about positional tracking, take a look at how positional tracking works.