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argoverse / av2-api

Argoverse 2: Next generation datasets for self-driving perception and forecasting.
https://argoverse.github.io/user-guide/
MIT License
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What does the term "multi-world" mean? #196

Closed ares89 closed 1 year ago

ares89 commented 1 year ago

@wqi hello, what does the term "multi-world" mean? I have been unable to find a specific definition or reference to it. I guess that, one scenario only have six wolrds, every world has one probability.

ares89 commented 1 year ago

I found the new submission format of multi-world motion-forecasting, is this using in evalai now?

wqi commented 1 year ago

Hi @ares89, the term "multi-world" is used in the context of AV2 to differentiate this year's motion forecasting challenge setup (which requires predictions for multiple actors in each scenario) from last year's - which requires predictions to be submitted only for the focal agent (hence "single-agent" prediction).

Each "world" refers to a single predicted joint future capturing the state of all actors in the scene. This differs from an alternative multi-agent prediction setup where the predicted trajectories for each actor could be scored individually.

Please let me know if any of these terms are still unclear - happy to explain in more detail!

Closing this issue out for now, but please feel free to re-open if you have any more questions. :-)