Hi @TriEightz,
Could you elaborate what values you added to your bouding box with label “0” for a background image ?
I’ve tried setting an all zero tensor for instance [0, 0, 0, 0] as a bounding box for images with no objects and have set the label as “0” but recieved the same error as @Seba.
As tengerye pointed out, option 1 is currently being used even in detectron2.
Any explanation that you or anyone else could provide on how to handle negative images (i.e. images with only background and no object) would be really appreciated.