Translations:Transfer Learning/11/en

Strategy	Description	When to use
Feature extraction	Freeze all pretrained layers; train only a new output head	Very small target dataset; source and target are closely related
Fine-tuning (full)	Unfreeze all layers and train end-to-end with a small learning rate	Moderate target dataset; source and target differ meaningfully
Gradual unfreezing	Progressively unfreeze layers from top to bottom over training	Balances stability of lower features with adaptation of higher ones