Why rotate only the ground truth

[tjkfly]

train_pipeline = [
dict(type='LoadMultiViewImageFromFiles', to_float32=True),
dict(type='PhotoMetricDistortionMultiViewImage'),
dict(type='LoadAnnotations3D', with_bbox_3d=True, with_label_3d=True, with_attr_label=False),
dict(type='GlobalRotScaleTransImage',
rot_range=[-22.5, 22.5],
scale_ratio_range=[0.95, 1.05],
translation_std=[0, 0, 0],
reverse_angle=True,
training=True,
flip_dx_ratio=0.5,
flip_dy_ratio=0.5,
only_gt=True,),