Codice Markers
Success
1.4.1
Codice markers are square 2D barcodes, each with a unique marker code, printed on paper or other material and used on the MultiTaction touchscreens. Applications can access the marker information and react to them in specific ways.
Marker Size
MultiTaction MT556XNB and MT556UNB displays support 4x4 Codice markers. These markers support up to 4096 unique codes. In order for the displays to recognize the codes reliably, the block size in the markers must be large enough. See table below for minimum recommended block size for each display:
Display Block Size Marker Dimensions PDF Download
MT556XNB 5.0mm 40x40mm Download MT556UNB 5.5mm 44x44mm Download
You can download ready-made PDF versions of the markers from the table above.
Printing Markers
When printing your markers, use suitable material to ensure the markers will work properly.
Usually, you would test your markers by simply printing them onto standard paper. But to test other materials, you must print a sample marker and place it on an actual MultiTaction display. Then observe the camera image visualization in the OSD and verify that the black regions of the marker appear dark on the camera image and the white regions appear white. Also verify that the marker code is recognized correctly.
You must use a real MultiTaction display to verify the marker behavior because the cameras in the display work in the infrared spectrum, around 850nm wavelength. Consequently, it is possible to have visually black material on your marker that is completely reflective in the infrared spectrum and appears white on the camera image.
Note
It is not enough to create a black and white marker, then visually inspect it and assume that it works!