Variational Autoencoders: Advanced Techniques and Representation Learning
Chapter 1: Foundations of Probabilistic Generative Models and Representation Learning
Probabilistic Models: An Advanced Perspective
Latent Variable Models: Theory and Formulation
Core Principles of Representation Learning
Evaluating Representation Quality: Metrics and Methodologies
Autoencoders Revisited: Limitations for Generative Tasks
Information Theory in Representation Learning
Chapter 2: Variational Autoencoders: Mathematical Deep Dive
VAE Derivation: Variational Inference
The Evidence Lower Bound (ELBO) Formulation
The Reparameterization Trick
KL Divergence in VAEs: Role and Interpretation
VAE Encoder and Decoder Network Design
Common VAE Training Difficulties
Analysis of VAE Objective Functions
Hands-on Practical: VAE Implementation and Diagnostics
Chapter 3: Advanced VAE Architectures and Modifications
Conditional VAEs (CVAEs) for Controlled Generation
Hierarchical VAEs for Complex Data Structures
Vector Quantized VAEs (VQ-VAEs)
Autoregressive Decoders in VAEs
Normalizing Flows for Flexible Priors and Posteriors
Beta-VAEs for Disentangled Representations
FactorVAEs and Total Correlation VAEs (TCVAEs)
Hands-on Practical: Implementing Advanced VAE Architectures
Chapter 4: Inference Techniques and Amortization in VAEs
Amortized Variational Inference: Strengths and Weaknesses
Limitations of Mean-Field Approximations
Structured Variational Inference in VAEs
Importance Weighted Autoencoders (IWAEs)
Auxiliary Variables and Semi-Amortized Variational Inference
Variational Inference with Implicit Models
Adversarial Variational Bayes (AVB)
Practice: Implementing IWAEs and Advanced Inference
Chapter 5: Disentangled Representation Learning with VAEs
Defining Disentanglement: Formulations and Difficulties
Metrics for Quantifying Disentanglement
The Influence of KL Regularization on Disentanglement
Information Bottleneck Theory and VAEs for Disentanglement
Adversarial Training for Disentanglement
Group-Theoretic Approaches to Disentanglement
Identifiability and Limitations in Disentanglement Learning
Hands-on Practical: Training and Evaluating Disentangled VAEs
Chapter 6: VAEs for Sequential and Structured Data
Recurrent VAEs (RVAEs) for Time Series Modeling
VAEs with Attention Mechanisms for Sequences
Graph VAEs for Structured Data Representation
VAEs in Natural Language Processing
Temporal VAEs for Video and Dynamic Systems
Connections between State-Space Models and VAEs
Practice: Implementing VAEs for Sequential Data
Chapter 7: Advanced Topics and Extensions of VAEs
Semi-Supervised Learning with VAEs
VAEs for Anomaly Detection and Out-of-Distribution Detection
Generative Adversarial Networks (GANs) vs. VAEs: A Comparative Analysis
Hybrid Models: VAE-GANs and Adversarial Autoencoders (AAEs)
VAEs in Model-Based Reinforcement Learning
Denoising VAEs and Input Perturbation Robustness
Advanced Optimization Strategies for VAEs
Hands-on Practical: Exploring Hybrid VAE-GAN Architectures
VAEs for Anomaly Detection and Out-of-Distribution Detection
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- Auto-Encoding Variational Bayes, Diederik P Kingma, Max Welling, 2013 arXiv preprint arXiv:1312.6114 DOI: 10.48550/arXiv.1312.6114 - The original paper introducing Variational Autoencoders, establishing the fundamental framework for their use in generative modeling and subsequent applications like anomaly detection.
- Variational Autoencoder based Anomaly Detection using Reconstruction Probability, Jinwon An, Sungzoon Cho, 2015 Special Lecture on IE, Vol. 2 - A primary reference detailing the application of VAEs for anomaly detection by leveraging reconstruction error as a key anomaly score.
- Do Deep Generative Models Know What They Don't Know?, Eric Nalisnick, Akihiro Matsukawa, Yee Whye Teh, and Balaji Lakshminarayanan, 2018 International Conference on Learning Representations (ICLR) (International Conference on Learning Representations (ICLR)) DOI: 10.48550/arXiv.1802.04013 - This paper highlights limitations of using raw likelihoods from deep generative models, including VAEs, for reliable out-of-distribution detection, providing important context for VAE-based anomaly scoring.
- beta-VAE: Learning Basic Visual Concepts with a Constrained Variational Framework, Irina Higgins, Loïc Matthey, Arka Pal, Christopher Burgess, Xavier Glorot, Matthew Botvinick, Shakir Mohamed, and Alexander Lerchner, 2017 International Conference on Learning Representations (ICLR) DOI: 10.48550/arXiv.1611.00005 - Introduces a variant of the VAE that encourages disentangled latent representations by modifying the ELBO, which can improve the quality of latent spaces for anomaly detection purposes and mitigate posterior collapse.