Why is accuracy from fit_generator different to that from evaluate_generator in Keras?

Question

What I do:

• I am training a pre-trained CNN with Keras fit_generator(). This produces evaluation metrics (loss, acc, val_los

Answer 1

Training for one epoch might not be informative enough in this case. Also your train and test data may not be exactly same, since you are not setting a random seed to the flow_from_directory method. Have a look here.

Maybe, you can set a seed, remove augmentations (if any) and save trained model weights to load them later to check.