Questions about data augmentation

[cwpeng-cn]

Here are three functions related to data augmentation，include pose_processing，j2d_processing and j3d_processing. Code Link

When doing rotation augmentation on 2d joint data (j2d_processing), the rotation is around the center of the cropped image. When doing pose_processing, the rotation center is pevis node. But the center of the picture is not the pelvic node, is this wrong?

Hope to hear from you as this question has puzzled me for a long time. Have a nice day :)