2D bounding boxes

[finnweiler]

Is there a way to extract accurate 2D bounding box data from the 3D bounding boxes?

[jianingwei]

You can fit a 2D bounding box to the projections of the 3D bounding box vertices.

[finnweiler]

You are correct, I can extract a rough 2D bounding box by drawing a box around the 3D box projection (marked in red). My actual goal is to have an accurate 2D bounding box (marked in green).

[jianingwei]

I'm unaware of an easy way to find the tight green bounding box from the 3D bounding box. Alternatively you can find a rotated bounding box that's fits the object tightly.