Object ID for Tracking

[MarcMatute]

Hey there!

Firstly, thank you very much for your work! Probably it will be very useful.

For various reasons, I need to get the object ID for every object. I edited the code in such a way so that now I can see the object ID in the frame result. However, the way I did it seems like object IDs are not coherent frame after frame.

For example, here we have one object ID for a smoke object:

And the same object but with a different ID in the same video:

The changes I made are very little in the writing results part in detect.py:

`

             # Write results
            for idx, (*xyxy, conf, cls) in enumerate(reversed(det)):
            
                # Add the object_id to the label
                object_id = list(centroids.keys())[idx]
                c = int(cls)  # integer class
                label = None if hide_labels else (f'ID: {object_id} {names[c]}' if hide_conf else f'ID: {object_id} {names[c]} {conf:.2f}')
                
                annotator.box_label(xyxy, label, color=colors(c, True))
                
                if save_crop:
                    save_one_box(xyxy, imc, file=save_dir / 'crops' / names[c] / f'{p.stem}.jpg', BGR=True)

`

Thank you in advance!