I am evaluating tensorflow object detection API.
I have looked at a few articles that I found on the Internet and I am able to train the model and evaluate object detection successfully.

When I started training, there were about 100 images that are labeled. 
I want to add two or three news images to TFrecord.
After adding those images, should I delete my model\_output directory and start train.py or can I do that on top of existing checkpoints?