We’re using affectiva to track facial expressions of subjects in out lab. We have a C# application running on windows 7 that writes data to a CSV file.
For a proportion of the machines (9 out of 25) the logging stopped long before the session ended. Some follow up tests appear to indicate that the issue is arising where the face is lost (say the subject is distracted and looks away) for longer than some period - which we believe about 5 minutes - whereupon the camera appears to shut down (light goes out) and no further information is tracked (there are no further call backs from the detector, even to say that there is no face). Is there a way to detect such a camera loss or shutown from the API?
My feeling is that the root problem is some setting on the problem machines that turns off the cameras, but would like to confirm that at the same time as fixing it.