Fiducial marker
A fiducial marker is a visible object placed in an environment so an imaging system (camera) recognizes it as a reference object to anchor virtual content in augmented reality. In VR and AR, fiducial markers are used for positional tracking of HMDs and handheld controllers. Fiducial markers can be utilized in both inside-out tracking and outside-in tracking.
In inside-out tracking, markers such as QR codes can be placed in the environment to serve as reference points.
In outside-in tracking, markers such as light-emitting diodes can be placed onto the object so it can be tracked by the external camera(s). The camera or multiple cameras would follow the movement and position of the marker to figure out its position and orientation in 3D space. Different markers can be placed on different objects so they can be tracked independently.
Types[edit]
- ArUco marker[1]
- Maxicode
- QR code
- Matrix
- TRIPtag[2]
- CALTag
- RUNE-Tag[3]
- ARToolkit[1]
- ARToolkitPlus[1]
- ARTag[1]
- AprilTag[1]
- STag[1]
- ChromaTag[1]
- CCTag[1]
- FourierTag[1]
- TopoTag[1]
- ReacTIVision[1]
References[edit]
- ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 1.10 [https://cvg.cit.tum.de/_media/members/demmeln/loipfuehrer2022ma.pdf "Efficient and Robust Circle Grids for Fiducial Detection"]. https://cvg.cit.tum.de/_media/members/demmeln/loipfuehrer2022ma.pdf.
- ↑ https://ognjen.io/quick-rundown-of-barcodes-and-marker-systems/
- ↑ Vandenbussche, Vincent (2023-11-04). "Tired of QR codes? Build your own fiducial marker". https://towardsdatascience.com/tired-of-qr-codes-build-you-own-fiducial-marker-aab81cce1f25/.