Images malformed during preprocessing

[UsmannK]

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I noticed my RGB maps were oddly split down the middle and flipped. It's due to the negative indices rolling over.

A fix would involve adding + Height / 2 to this line: https://github.com/ghimiredhikura/Complex-YOLOv3/blob/master/utils/kitti_bev_utils.py#L33

Am I correct? I feel like I must be missing something. Why are these two lines not the same?