Unable to access history of each tracked object after the tracker.update() method about norfair

@facundo-lezama : yes ,the explanation you provided above has resolved my query.

[facundo-lezama]

Hi @avadhut-00, I reviewed your notebook and saw that you were using TrackedObject.past_detections to access the list of past bounding boxes associated with the specific object. That's currently the way Norfair expects you to do it. So I don't fully understand the problem you are facing when using it. Are you getting empty lists? Are you getting an incomplete list of past bounding boxes? Can you provide some more information?

I have made the required changes in the public notebook to explain my point further:

1. Trying to get the list of past detections with 't1.past_detections' cmd gives an object memory location instead of bbox co-ordinates--->[<norfair.tracker.Detection object at 0x7f19c469a610>]

2. When I issue the command 't1.past_detections' I am expecting list of the form [[[x1,y1],[x2,y2]],[[x1,y1],[x2,y2]],[[x1,y1],[x2,y2]],[[x1,y1],[x2,y2]]]

3. The list above is for a single tracked object having its detection co-ordinate history for the frames it was detected & tracked on

[facundo-lezama]

Thanks for the detailed explanation, I now understand what's happening.

The output of TrackedObject.past_detections is a list of Detection objects with the past detections. So if you want to get the actual bounding boxes, you should access Detection.points for each of the past detections in the list.