2D bounding boxes request

[yd-yin]

As mentioned in #46, directly fitting a 2D bbox by the projected vertices of 3D bbox can be very inaccurate. For example, the actual 2d bbox in green and the fitted one in red.

Is there any better way to get the 2d bbox?

[ahmadyan]

We did not annotate the 2D bounding boxes.

My 0.02, you can always run an off-the-shelf 2D object detector (like EfficientNet or Yolo) and get the 2D bounding box and check if it is within the 'over-sized' crop we get from the 3D bounding box.