Is there a link between detections and tracked_objects. (maintain order) about norfair

[Edohvin]

@facundo-lezama

I used tracked_object.last_detection.points to get the xy coordinates of each tracked object. Then I compared these xy coordinates to the xy coordinates of all the bounding boxes. This allowed me to link what bounding boxes corresponded to which trackids. Not sure if this is the most calculation efficient, but it got the job done! Thank you

[facundo-lezama]

Hi @Edohvin,

norfair.update() returns only the live objects, but if you need to debug the uninitialized objects, you can access the complete list of objects on tracker.tracked_objects. Please consider that this list does not follow the detections list order but instead is ordered by ID. If you need to check which detection matched each tracked object, you may use tracked_object.last_detection.

Regarding your last comment on the length of the lists, please note that objects don't disappear instantly; instead, their life is controlled by the hit_counter_max, so you may still see some objects for a while that have left the frame.