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The Chaperone system is a utility design by [[Valve]] to be used with their [[Virtual Reality#Platforms|VR platform]], [[SteamVR]], and [[Virtual_Reality#Devices|Head Mounted Display]], the [[HTC Vive]]. Once set up, it keeps track of where a user is in relation to the physical walls around them, and if necessary, shows a [[#Collision Bounds|blue grid]]<ref>Chan, N. (2015). HTC Vive vs. Oculus Crescent Bay: My 10 VR takeaways. Retrieved from http://www.tested.com/tech/concepts/504521-htc-vive-vs-oculus-crescent-bay-my-10-vr-takeaways/</ref> within the user's virtual space to notify them that they are in close proximity to a physical barrier. The [[HTC Vive]] provides tracking within an approximately 15 -foot by 15 -foot area, and the Chaperon system provides assures the user with confidence users that they will not collide with any physical barriers as they experience their the virtual content. The first working prototype was introduced at CES 2016 with the announcement of HTC's second Vive development kit.

The main purpose of the Chaperone system is to warn the user when they approach a physical barrier, to which they are blind because of the headset they are wearing. This will ideally prevent collisions and minimize accidents. This may help [[, and thus solve the problem of real space navigation in virtual reality]] experiences be more immersive because . The system recognizes objects and represents them in the observer trusts that they are safe user's field of view as glowing outlines and silhouettes. It makes it entirely possible to move around change position from standing to sitting on a chair, walk from object to object in the environmentreal world, and safely takes advantage of all available space in a user’s room.

A secondary purpose for the Chaperone system is to allow games to interact with the user in a unique way. Because the Chaperone system has information about the user's environment, virtual applications can react to the user's surroundings. It could, for example, generate a location that matches the orientation and layout of the user's room. Conversely, the system could use a techniques like overlapping spaces or [[directed walking]]<ref>http://ictSuma, E.A., Lipps, Z., Finkelstein, S., Krum, D.M. and Bolas, M.usc(2012).edu/pubs/Impossible%20SpacesSpaces: Maximizing natural walking in virtual environments with self-%20Maximizing%20Natural%20Walking%20in%20Virtual%20Environments%20with%20Selfoverlapping architecture. IEEE Transactions on Visualization and Computer Graphics, 18(4): 555-Overlapping%20Architecture.pdf564</ref> to make traverse-able, virtual environments that seem much larger than the user's physical space by distorting the user's perception of distance and rotational displacement.

==Current Limitations==At The latest version of Chaperone system has two modes of operation. In the time of writingfirst mode, the set up procedure for Vive is inactive until users get close to a wall or an obstacle. The headset then shows a glimpse of the Chaperon system involves manually delineating real world to give users enough time to react and avoid any obstacle. The second mode is activated by double-tapping a menu button on the corners controller. In this mode, users see an instant view of all their surrounding. ==Collision Bounds==Collision Bounds is the physical space with the blue grid that appears in [[SteamVR ControllersVR]]when the user is close to physical barriers in real life. On October 27, 2015, Valve introduced different styles of the grid for beta testing:<ref name="collision beta">Vlachos, A. (2015). Collision Bounds change - Feedback please. Retrieved from https://steamcommunity.com/app/358720/discussions/0/483368526588965793/</ref>

One other limitation of *Squares - Small floating squares on wall surfaces;*Beginner - Grid pattern with the Chaperone system is that it is currently limited to mapping intersections removed;*Intermediate - Same as beginner but square openings are about 2.25x the area (bars are 1.5x farther apart);*Advanced - A single horizontal line on each wall;*Developer - A persistent line loop at floor and walls of a space. This means -level that if never fades away, helping the user's space includes a couch it would not be mapped and would present an invisible obstacle (it could, however, to always be defined as the limiting 'wall' on that side aware of where the space)walls are by just glancing down.

Finally, ==Current Limitations==The only remaining problem and potential danger is the physical model built by the Chaperone system is staticattached cord. If any portion of the setup changesUnfortunately, such as moved furniture, it would Chaperone does not be reflected in detect the model cord, and therefore not be used it is possible for users to guide the usertrip over it and fall.

According to comments by the [[Lighthouse]] developers at conventions and on Twitter<ref>Yates, A. (2015). Retrieved from https://twitter.com/vk2zay/status/573909197949009920</ref>, as well as the emphasis on mapping in its patent<refname="patent">httpUnited States Patent and Trademark Office. Chaperone. Retrieved from https://tsdr.uspto.gov/#caseNumber=86558185&caseType=SERIAL_NO&searchType=statusSearch</ref>, it seems likely that the [[HTC Vive]] will eventually use a stereo pair of cameras or a depth camera to aid in "detection and measurement" the user's surroundings. This might be a one-time calibration, or it could provide constantly updating information to capture changes in the user's environment. Gathering data in this fashion would also likely allow the recognition of furniture and other small objects.

Valve Corporation filed for a patent entitled 'CHAPERONE' on March 09, 2015<refname="patent">http://tsdr.uspto.gov/#caseNumber=86558185&caseType=SERIAL_NO&searchType=statusSearch</ref>. In it is contained this description of the Chaperone system: ''Hardware and software, sensors, and base stations for the detection and measurement of physical objects and the representation of such objects in virtual reality environments; Devices used for the detection and measurement of physical objects and the representation of such objects in virtual reality environments; Electronic apparatus for the detection and measurement of physical objects and the representation of such objects in virtual reality environments'' The first consumer-ready implementation of Chaperone was introduced at CES 2016 as a part of the HTC Vive Pre headset.

''Hardware ==Chaperone and softwarethe Guardian system==The Chaperone has been compared with the Rift’s Guardian system. Both systems enable the user to interact safely with the virtual space. However, sensors, and beacons the front camera in the Vive allows for the detection and measurement projection of physical objects and the representation of such objects outside world in the virtual reality environments; Devices experience, further helping the user to avoid crashing into obstacles. The camera can also be used for to find something in the detection and measurement of physical objects and room without having to remove the representation of such objects in virtual reality environments; Electronic apparatus for headset. This, according to some opinions, has given Chaperone the detection and measurement of physical objects and edge over the representation of such objects in virtual reality environments''Guardian system. <ref name=”vs”>Smith, S.L. (2017). Oculus Rift vs. HTC Vive: The Rift is best all around. Retrieved from https://www.tomsguide.com/us/oculus-rift-vs-htc-vive,review-3433.html</ref>

[[Category:Terms]] [[Category:Technical Terms]] [[Category:SteamVR]]