Hi @balchen, we ran a “debug-video” for your device. Basically what we do, is to run a short video trough the same detection model of your device (but offline and only for the short video you provided). We overlay the detection-script and can visually see what the device is counting. This is addressing both your question on bike overcounts and your latest finding on missed detections with the sun now. A few findings:
- First and foremost, this site is quite a challegning location for Telraam. The street is very wide and there’s some obstacles in the field of view. I would have expected missed detections on the far side, but that’s not the case; it’s even counting pedestrians & bikes on the far side. so far so good.
- The cause of the overcount seems to be detection of static objects (bikes/pedestrians) which are “picked up” by the tracking algortihm and then counted as moving, adding to the tally. Those objects are near the bus-stop and are on the edge of the region of interest. Our hypothesis now is that the recognizable static objects, in combination with their location on the edge of the RoI is causing these extra counts. I can’t really see what can be done to avoid it. You may want to consider a different RoI, trying to get the bus-stop out of the RoI. However, no guarantees it will be better.
- undercounts due to direct sunlight, yes, absolutely. If the orientation of your window is S/SW and you have episodes of direct sunlight in your Telraam, that will cause problems. I would expect mostly (only?) the far side is affected. It may be worse in spring/autumn, depending on lattitude and window orientation. You could try shielding the device, but should be from the outside and I understand thisis not practical. Actually, if you can shoot another video at a time & conditions it’s the worst, we can run a 2nd debug video.
Overall conclusion from what we can see, quite a challenging location and a bit a of “bad luck” (bus stop on the edge, direct sunlight due to orientation). I’d consider trying with different ROI’s. The nice thing is you can directly compare with a high-end traffic counter nearby and see what setting yields the best results (which makes this case super useful for us as well!). Secondly, not sure if it’s an option, but try installation on a different window (a bit lower and -if possible- with a cleaner field of view).
Please keep feedback coming, this is really usefule for us, so we know what to focus on in the next development iteration!