Coordinate backward conversion

[xinli94]

Hi,

I am wondering if this part will introduces some bugs https://github.com/DetectionTeamUCAS/R2CNN_Faster-RCNN_Tensorflow/blob/854fe56697132ef82b13e9570f077fcd9e6c6e78/libs/box_utils/coordinate_convert.py#L43

Because cv2 minRectArea gives us angles ranging from -90 to 0 degrees, which means some box will be rotated 90 degrees if we use this back_forward_convert func. Is this expected?

Any suggestion on fixing this?

Best,
Xin

[xinli94]

There is a workaround if we want the angle between the longer side and vertical - but is it possible to get the groundtruth angle without any assumption?