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C2 Series User Manual Rev. 1.9
The Advanced AOI Functions
The C2 series features an area CMOS sensor, whose frame rate depends on the number of pixels to
readout. By defining a sensor Area of Interest (AOI) the frame rate and hence the profile speed will
be significantly increased due to the smaller number of pixels to readout.
In some cases the AOI position may not be constant and it should follow the image of laser line on
the camera sensor. The C2 series features functions for performing an automatic AOI positioning
(AOI-Search) as well as line tracking (AOI-Tracking).
AOI-Search
The AOI-Search mode can be used in 2D mode as well as in 3D mode and has the benefit to adjust
the AOI at the start of the acquisition to the optimal position of the laser line. In that case the laser
line is automatically centered to the AOI.
The user must only define the minimum required AOI-Height (number of required sensor rows) for
the expected laser line and afterwards the camera will adjust the vertical AOI-Offset (AoiOffsetY)
value to the best position.
AOI-Tracking
The automatic AOI-Tracking is the dynamic version of the static AOI-Search mode. While the AOI-
Search is only working at the beginning of each 3D acquisition, the AOI-Tracking mode is working
continuously during 3D image acquisition.
Thus 3D profile acquisition with AOI-Tracking is able to cover the complete image/sensor size
although the defined AOI size could be much smaller. This is very useful in case of applications
involving continuous profile measurements with variable distances to the surface.
A detailed description of these functions can be found in a separate application note.
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