What data is required to run generate_detections.py?

[mj2323]

First of all, thank you for your inspiring work.

My goal is to accquire the performance of StrongSORT with my own custom dataset. Therefore, I first tested your performance and confirmed that it matches the performance metrics in the presented paper. The performance is the experimental value for the MOT17 validation set.

After that, I checked your Auxiliary tutorial and realized that first of all, I need detection data (.json). Additionally, Re-ID data (.npy) must be obtained using detection information.

In conclusion, my questions are below:

I would like to ask what the two variables (dir_in_det, dir_out_det) mean in the code in this link.

I understand that I need to use the code from this link, but I'm not sure what the causal relationship is between the json file obtained from that code and the dir_in_det and dir_out_det variables.

('/data/dyh/results/StrongSORT/TEST/MOT20_YOLOX_nms.8_score.1', '/data/dyh/results/StrongSORT/TEST/MOT20_YOLOX_nms.8_score.1_BoT-S50')

Also, I would appreciate it if you could tell me what I need to do to get this data.

Sincerely,

[dyhBUPT]

Hi, thanks for your interest in our work. The dir_in_det is the directory of input detections, and dir_out_det is to save output features. Specifically, take MOT-test as an example, the dir_in_det directory should contain the following files:

- MOT17-01-FRCNN.txt
- MOT17-03-FRCNN.txt
- MOT17-06-FRCNN.txt
- MOT17-07-FRCNN.txt
- MOT17-08-FRCNN.txt
- MOT17-12-FRCNN.txt
- MOT17-14-FRCNN.txt

And each file contains all detections of the corresponding video, and the format is like:

1,-1,834.30,490.39,70.20,88.42,0.76,-1,-1,-1
1,-1,901.80,491.40,54.00,96.53,0.86,-1,-1,-1
2,-1,1091.47,501.19,78.30,108.68,0.42,-1,-1,-1
2,-1,147.83,482.63,52.65,124.87,0.11,-1,-1,-1

To obtain these files, you should write a script to convert the obtained detection json file to the required txt file.

I hope this will help you.

[mj2323]

Thanks for your answer, Du. I was able to understand the overall content from your answer.

Lastly, I would like to ask you one more question. Just do I only convert json type to txt without converting the format in the data? Or do you provide code for the process of converting json to txt?

[dyhBUPT]

Yes, you don't need to convert the format of data. So it may be easy for you to write a converting script~

Best wishes.