SAM: Sharpness Aware Minimization
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Feb 8th, 2024 まとめ
- Sharpness-aware minimization for efficiently improving generalization
- Sharpness-aware minimization leads to low-rank features
- [Wen22] How does sharpness-aware minimization minimize sharpness?
- [Wen23] Sharpness minimization algorithms do not only minimize sharpness to achieve better generalization
- Normalization layers are all that sharpness-aware minimization needs
- Same pre-training loss, better downstream: Implicit bias matters for language models
Original Paper
Sharpness-Aware Minimization for Efficiently Improving Generalization
- Authors:
- Pierre Foret, Google Research
- Ariel Kleiner, Google Research
- Hossein Mobahi, Google Research
- Behnam Neyshabur, Blueshift, Alphabet1.
- Accepted at ICLR2021
- Findings: The authors demonstrate through rigorous empirical study that SAM improves model generalization across a range of widely studied computer vision tasks and models. The use of SAM also provides robustness to label noise. The authors further elucidate the connection between loss sharpness and generalization through the lens provided by SAM.
Analysis
Why Does Sharpness-Aware Minimization Generalize Better Than SGD?
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Normalization Layers Are All That Sharpness-Aware Minimization Needs
How Does Sharpness-Aware Minimization Minimize Sharpness?
Sharpness-Aware Minimization Leads to Low-Rank Features
Rethinking Sharpness-Aware Minimization as Variational Inference
SAM as an Optimal Relaxation of Bayes
When Do Flat Minima Optimizers Work?
Curvature
On the Maximum Hessian Eigenvalue and Generalization
The Hessian perspective into the Nature of Convolutional Neural Networks
Escaping Saddle Points for Effective Generalization on Class-Imbalanced Data
Latent Space Oddity: on the Curvature of Deep Generative Models
Noise Stability Optimization for Flat Minima with Optimal Convergence Rates
Enhancement of SAM
Improved Deep Neural Network Generalization Using m-Sharpness-Aware Minimization
Make Sharpness-Aware Minimization Stronger: A Sparsified Perturbation Approach
TRAM: Bridging Trust Regions and Sharpness Aware Minimization
Efficiency
Random Sharpness-Aware Minimization / NeurIPS2022
Randomized Sharpness-Aware Training for Boosting Computational Efficiency in Deep Learning
Towards Efficient and Scalable Sharpness-Aware Minimization
Auto-Tuning
Provable Sharpness-Aware Minimization with Adaptive Learning Rate
AdaSAM: Boosting Sharpness-Aware Minimization with Adaptive Learning Rate and Momentum for Training Deep Neural Networks
ASAM: Adaptive Sharpness-Aware Minimization for Scale-Invariant Learning of Deep Neural Networks
Domain Specific
When Vision Transformers Outperform ResNets without Pre-training or Strong Data Augmentations
Sharpness-Aware Minimization in Large-Batch Training: Training Vision Transformer In Minutes
Improving Sharpness-Aware Minimization with Fisher Mask for Better Generalization on Language Models
Improving Shape Awareness and Interpretability in Deep Networks Using Geometric Moments
- Authors:
- Rajhans Singh, Arizona State University
- Ankita Shukla, Arizona State University
- Pavan Turaga, Arizona State University.
- Accepted at CVPR 2023 Deep learning for Geometric Computing workshop
- Findings: The authors introduce the Deep Geometric Moment (DGM) architecture, a deep-learning model that relies on geometric moments to measure shape-related properties. The DGM model generates discriminative features for classification tasks, outperforms existing ResNet models on standard datasets, and provides interpretable features at any level. The DGM model also only requires fine-tuning of the coordinate basis pipeline, instead of retraining all the model parameters, In particular, the proposed Deep Geometric Moment (DGM) architecture provides four key benefits compared to existing models. First, the model generates discriminative features for classification task by accounting for shape information through the proposed deep geometric moments. Second, our model outperforms existing ResNet models on standard datasets without using any pooling layer or reducing the spatial dimension. Third, it provides an easy access to interpretable features at any level by simple re-projection of moments. Finally, compared to existing models, the DGM model only requires finetuning of the coordinate basis pipeline without retraining all the model parameters.