how to get coco evaluation metrics on a different dataset than train and test after doing inference on it? With tensorflow object detection api

I’ve trained a model with tensorflow object detection api with a dataset splited into train and test. After that I retrieved the coco evaluation metrics. But now I’d like to do inference on a different dataset, a validation dataset, and after that I want to get the coco metrics but I really don’t know how to do it, there’s not much information about this. If you could help me out I’d appreciate it

Thank you