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Machine Learning and Deep Learning

537Understanding Class Imbalance
538Why Imbalance Breaks Standard Classifiers
539Resampling: Oversampling the Minority Class
540SMOTE: Synthetic Minority Over-sampling
541SMOTE Variants and Adaptive Techniques
542Resampling: Undersampling the Majority Class
543Combined Resampling Strategies
544Class Weights and Cost-Sensitive Learning
545Threshold Adjustment for Imbalanced Data
546Ensemble Methods for Imbalance
547Focal Loss and Hard Example Mining
548Evaluation Metrics for Imbalanced Classification
549Multi-Label vs Multi-Class: Key Differences
550Problem Transformation: Binary Relevance
551Problem Transformation: Classifier Chains
552Problem Transformation: Label Powerset
553Multi-Label Loss Functions
554Multi-Label Evaluation Metrics
555Neural Networks for Multi-Label Classification
556Label Correlation and Embedding Methods

Machine Learning and Deep Learning

537Understanding Class Imbalance
538Why Imbalance Breaks Standard Classifiers
539Resampling: Oversampling the Minority Class
540SMOTE: Synthetic Minority Over-sampling
541SMOTE Variants and Adaptive Techniques
542Resampling: Undersampling the Majority Class
543Combined Resampling Strategies
544Class Weights and Cost-Sensitive Learning
545Threshold Adjustment for Imbalanced Data
546Ensemble Methods for Imbalance
547Focal Loss and Hard Example Mining
548Evaluation Metrics for Imbalanced Classification
549Multi-Label vs Multi-Class: Key Differences
550Problem Transformation: Binary Relevance
551Problem Transformation: Classifier Chains
552Problem Transformation: Label Powerset
553Multi-Label Loss Functions
554Multi-Label Evaluation Metrics
555Neural Networks for Multi-Label Classification
556Label Correlation and Embedding Methods

← Machine Learning and Deep Learning

Lesson 547 of 3,538·13. Imbalanced and Multi-Label ProblemsPro lesson

Focal Loss and Hard Example Mining

Derive focal loss for down-weighting easy examples, focusing gradient updates on hard misclassified samples in imbalanced sets.

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