[[File:ArucoMarker.PNG|250 px|right|thumb|alt=AR-Marker|AR-Marker]]
AR -Markers are square fiducial markers composed by a wide black border and a inner binary matrix which determines its identifier (ID). These markers are detected in the camera stream of the [[POI_View|POI View]] and can be used for [[AR-Marker#Direct_Augmentation|Direct Augmentation]] or [[AR-Marker#AR-Marker Device Pose Estimation|Device Pose calculation]].
The AR-Marker ID is defined as an integer value between zero and the maximum dictionary size (see [[AR-Marker#Marker Creation|Marker Creation]]). Once a marker is detected, the ID is used to gather additional information from the associated UBIK® object (see [[AR-Marker#Classifications|Classifications]]).
The four corner points of an AR-Marker are extracted to calculate the relative pose (position and orientation) between the camera and the AR-Marker, which serves as a basement for the above stated use-cases. For that , the camera of the mobile device has to be calibrated (see [[Camera_Calibration|Camera Calibration]]) and the AR-Marker side length has to be known.
== Marker Creation ==
Currently UBIK® is using the standard dictionary, allowing the creation of 1024 unique AR-Marker IDs. Markers can be created using the provided Aruco Marker Creation tool from the release portal (link to Tool). Once the tool is extracted, the ArucoMarkerGenerator.htm can be opened to configure the ID and side length. After clicking Generate Marker, the AR-Marker can be printed.
{{Hint|Note when printing AR-Markers the physical side length has to correlate with the AR-Marker side length property (see [[AR-Marker#Classifications|Classifications]]).}}