Clarification regarding the max_age, min_hits to negate rapid switch of object identities

[Mechazo11]

Dear Dr. Bewley (@abewley)

Good day.

Sir, I have been working on a Hybrid Indoor Positioning system that uses overhead camera imagery to detect multiple people across a scene. I have noticed that whenever the object detection module starts to make false hypothesis regarding the objects (in this case people), the SORT tracker rapidly changes the tracklet ID for a certain individual. i.e. if the person was assigned 2, after next 15-20 frames where the object detection model made mistakes in localization this individual, the SORT tracker now assigned a larger id number to this person (example 8, 20 etc). This large increment occurs within a 2-3 seconds time window.

Also, from going over your paper on SORT and some of the comments in Github Issues page, I was not able to fully grasp what were the contribution of max_age and min_hit parameters in the SORT algorithm.

Would you kindly comment on whether assigning a larger values to these two parameters and setting IOU threshold to 50% (as commented in the MOTChallenge and CLEAR-MOT papers) would decrease SORT's tendency to rapidly increment its internal id counter ?

With thanks, Azmyin Md. Kamal (@mechazo11)

[poornimajd]

Hey @Mechazo11 did you get any details on this ?

[haviduck]

https://github.com/abewley/sort/issues/75