How can I get labels_Delta_.json?

[Dondkeman]

First, thank you for providing useful dataset and code.

I have tried to get more accurately chunk classification. and now, I try to evaluate new trained model for spotting task. but, I couldn't correctly running evaluation code.

Generation of predictions00(Argmax/NMS/Center_00.json was success. but, I can't running 'get_detection_performance_spotting', because labelsDelta.json files.

I read this comment https://github.com/SilvioGiancola/SoccerNet-code/issues/6#issuecomment-613969675 from closed issues page.

How can I get(or generate?) labelsDelta.json ??

Thank you.

[SilvioGiancola]

You can copy the structure from your prediction in the json format, and create the labelsDelta.json from Labels.json for each delta. Basically, Labels.json is for spotting (single timestamp) while labelsDelta.json is for activities (start/end timestamp). Then I used the code from ActivityNet to estimate the mAP with tIoU>0 for each deltas.

Alternatively, look at this repo: https://github.com/cioppaanthony/context-aware-loss there is a function for the spotting evaluation (Average-mAP) that avoid this transformation from spotting to activities.

[Dondkeman]

That was very helpful, thank you.