Question regarding confidence

I have tried to check this sample deepstream_python_apps/apps/deepstream-imagedata-multistream at master · NVIDIA-AI-IOT/deepstream_python_apps · GitHub. I got confidence values by specifying cluster-mode != 0 in my config. I understand, that a grouped detection indication cannot have a common confidence.

With cluster-mode=1 I’m getting a lot of detections, all drawn overlayed as red rectangles around me. cluster-mode=2 returns again to the well known single rectangle and there is a confidence != -0.1

What cluster mode would I have to chose in order to enable myself to walk over all detections and sort out everything below a given threshold, say 0.5 or 0.6?