Confused arguments: 'to_bgr' and 'to_rgb'

[yeliudev]

mmaction2 uses the argument to_bgr when normalizing the images (see here). Specifically, this argument is passed to mmcv.imnormalize_. However, this method only supports to_rgb but not to_bgr. Does it mean that all the models in mmaction2 are actually trained in BGR mode?

[dreamerlin]

We use rgb

https://github.com/open-mmlab/mmaction2/blob/master/mmaction/datasets/pipelines/loading.py#L1303
https://github.com/open-mmlab/mmaction2/blob/master/mmaction/datasets/pipelines/loading.py#L1233-L1234

And actually, to_bgr and to_rgb are the same in mmcv.imnormalize_ since COLOR_BGR2RGB = 4 and cv2.COLOR_RGB2BGR = 4

[yeliudev]

I see. Thanks for your reply!