how to train referring expressions detection by this repo's implementation groundingDino?

[northeastsquare]

for example, I want to detect back cat, How to train from scrach or finetune?
in https://github.com/open-mmlab/mmdetection/blob/main/configs/grounding_dino/README.md, can only train scratch or finetune close set object detection.
Or how to add RefCOCO/+/g to train?

[hhaAndroid]

@northeastsquare You can directly refer to the documentation provided for fine-tuning. After fine-tuning, it becomes a nearly closed-set algorithm. Currently, "grounding dino" does not support training on "grefcoco". If deemed necessary, we will provide support for it in the near future.

[northeastsquare]

@hhaAndroid "grefcoco" training is very important, very necesssary. Could you give me some advise to implement it?