Started getting things ready so that I can tend to the camera buffer while the ITC is sampling, but I'm not doing that yet.
Doing the sampling with one function to start sampling, then another to collect the data, seems to be working.  Still some issues with doing frame acquisition between the two.
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Separated the image-collecting loop from the ROI extraction, b/c want to do ROI extraction only after we've collected the exposure signal.. Currently, Igor locks up hard when I do triggered imaging now.  Drat.