more than one object falls into the same grid

[buptlj]

Thanks for your great job! I have a question about SOLO.Can SOLO handle the situation that more than one object falls into the same grid?

[WXinlong]

@buptlj There is a multi-level prediction scheme to predict objects with difference sizes separately. Furthermore, the num_grid could be adjusted for those objects in a crowd, e.g. very small pedestrians. From the prediction results, the default SOLO setting works well on most of crowded cases of COCO.