Questions about boxes

[BearVic]

The paper described that the object instances were detected by Faster R-CNN, in this codes, however, did you just input the ground truth boxes directly?

[gaochen315]

No. We use Detectron to detect object boxes and we saved the detections in the pickle files.

[BearVic]

Thanks for answering so soon!
I have one more stupid question. why do you need the negative examples?

To be more specific, do you need to have exclusive classes pair like "carry" and "not carry"?

[gaochen315]

If you read our paper, you'll see there are three streams, namely human stream, object stream, and spatial configuration stream. The negative examples are mainly used to train the spatial configuration stream. Because it is crucial to teach the network what is definitely NOT the spatial relationship for an action.

[BearVic]

I got you. Thanks! You did a brilliant job!