Help in understanding dataset.pkl about boxcars HOT 3 CLOSED

So, I took the vp's as pairs of coordinates and plotted 3 lines, each starting from the center. Each of these lines indicate the direction towards a VP.

To my understanding, The edges of the bounding boxes must be parallel to the direction of VPs.

For some, it seems fine:

But for few, it's not.

Am I missing anything here?

from boxcars.

The easiest and safest way how to compute the 2D image coordinates of the vanishing points is to use intersection of lines on the 3D bounding box which should be parallel. I have always done it like this when I was working with the dataset.

It is possible that the the crop offset is not taken into account for the position of the vanishing points for some videos (the ones with non numeric name). These were the first videos which we processed and the dataset was extended after that. Therefore, it is possible that we have an inconsistency in the coordinates of the vanishing points.

from boxcars.

Thank you! That cleared my doubt.

from boxcars.