Strange MAP value

[xiannsa]

The model I trained achieved very good performance, but the evaluation results are unexpectedly low. What is the specific issue that occurred?

[KennyChen880127]

I think the issuie is from your custom dataset's 'class_names'. You shold add a comma after the last class name.Like this:

building_dataset = dataset_base.copy({ 'class_names': ('building', ), })

[xiannsa]

@KennyChen880127 Thank you, now the map is working fine.