How to check if the model is overffiting

This post is in response to (@PulkitS) Pulkit Sharma’s article on Faster R-CNN. I’m not understanding how can I check if the model is overffiting during training. I know the thoery, I just don’t know how to implement it. I have implemented the ‘data_gen_val’ validation data generator but I don’t know how to use it and which functions to use. Any suggestions?

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