BFP SYSTEM :
Quick Starting Guide
4.4. Set Region Of Interest
(ROI Tab)
You should now define the ROI that correspond to each optical fibre area where all pixels inside a ROI are
averaged to get an intensity for each optical fibre. Averaging on many pixels is a good way to reduce the
electronic noise, then improving the signal-to-noise ratio 'SNR'.
In order to be able to define the ROI, you need first to start a LIVE acquisition to see an image from the
camera(s). You may STOP it after a few seconds.
- Draw as many ROI as you need; we suggest to draw one ROI for each optical fibre, plus one outside to
monitor the background.
- A graph of the ROI average count vs time will appear and a row in right table for each ROI.
- You can rename each ROI by doubleclicking on its name in the table.
- With a configuration using 2 cameras, when a ROI is added, it is added on both cameras at the same
position. It is possible to keep them synchronized (Sync ROI between Cameras checkbox), but most of
the time, because of imperfect alignment between 2 cameras, it is preferred to move and resize ROI on
each camera.
- When ROI are defined, we suggest to save them using the 'Save' button in the ROI tab for faster setup
next day, and lock the editing to avoid moving them by mistake.
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