I am trying to classify images that has around 5000 classes. I am using fastai v1, resnet 50.
Training errors are going down but validation error are all over the place and total error is 99-100%.
Is resnet-50, even resnet-101,resnet150 a right architecture for this kind of classification.
As i understand resnet’s are pre-trained for 1000 classes. I am going for 5000 in a last layer.
Do I need to add more FC layers or Is there a alternative network I should consider (Google search did not help much)