Official repository for Big Transfer (BiT) models, providing pre-trained visual representations for efficient transfer learning across computer vision tasks.
Big Transfer (BiT) is an open-source project from Google Research that provides pre-trained deep learning models for computer vision tasks. It focuses on transfer learning, allowing developers to fine-tune these models on custom datasets with minimal data and computational resources. The models are trained on large-scale datasets like ImageNet-21k to capture general visual representations that boost performance across various downstream applications.
Machine learning researchers, computer vision engineers, and data scientists who need efficient, high-accuracy models for image classification, few-shot learning, or benchmark tasks like VTAB-1k. It's also suitable for educators and practitioners exploring transfer learning techniques.
BiT offers state-of-the-art pre-trained models with multi-framework support (TensorFlow, PyTorch, Jax), reducing training time and data requirements. Its emphasis on large-scale pre-training and knowledge distillation provides a unique balance of performance and efficiency, backed by rigorous research and extensive benchmarking.
Official repository for the "Big Transfer (BiT): General Visual Representation Learning" paper.
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Models are pre-trained on ImageNet-21k, offering richer visual representations than standard ILSVRC-2012 models, which boosts transfer learning performance across diverse tasks.
Provides fine-tuning code and model formats for TensorFlow 2, PyTorch, and Jax/Flax, as shown in separate installation and training scripts for each framework.
Includes multiple ResNet architectures (e.g., R50x1 to R152x4) to balance accuracy and speed, detailed in the available models section for tailored use cases.
Offers distilled models like BiT-R50x1 that maintain high accuracy with reduced computational footprint, based on research from the linked distillation paper.
Optimized for few-shot learning with configurable examples per class, demonstrated in the CIFAR benchmarks showing strong performance with minimal data.
Default hyper-parameters (BiT-HyperRule) are designed for Cloud TPUs and can be too resource-heavy for GPU setups, requiring manual tuning like batch size reduction.
Users must fine-tune models on custom datasets; there's no plug-and-play inference service, and integration relies on external data pipeline libraries.
Focused on image classification; adapting to other vision tasks like detection requires additional work, as models are tailored for VTAB-1k classification benchmarks.