E
N
The first, most left, could be the result after calibration of a Vmarker sensor placed on a
table. The second could be a ceiling mounted Vmarker sensor, somewhat further away, but
acceptable.
With the third sensor there is something wrong with the calibration. The sensor obviously
has to be recalibrated. Check if the sensor is configured correctly, check for interfering IR-
sources?
The calibration data is persistently stored in the Vmarker sensor itself. So even when the
Vmarker sensor is disconnected and has no power, the calibration information is kept.
Only when the position of the Vmarker sensor towards the projected image is changed a
recalibration is required.
Even when you connect a different computer to the Vmarker sensor and the projector a
calibration is not required, given the size, aspect ratio and position of the projected image
stays the same.
3.3.3.2 Calibration info
You can see the some info, the state shows if the sensor calibrated.
If for some reason the calibration screen is disappeard but the calibration process is still
running then you can see this here. The state ‘Calibration running’ shows the calibration is
still active. Point shows witch corner to point to.
With ‘Abort calibration you can stop the calibration process and return to the last
calibration data.
3.3.3.3 Sensor calibration
3.3.3.4 Abort calibration
With Abort calibration it is possible to abort the calibration process.
The previous calibration data will stay active.
3.3.3.5 Sensor alignment
Tool to setup the vmarker sensor before calibration. See
detailed information
18
Vmarker Interactive Whiteboard
