Update README.md
Browse files
README.md
CHANGED
|
@@ -1,3 +1,62 @@
|
|
| 1 |
-
---
|
| 2 |
-
license: mit
|
| 3 |
-
---
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| 1 |
+
---
|
| 2 |
+
license: mit
|
| 3 |
+
---
|
| 4 |
+
|
| 5 |
+
# Self-Supervised Learning Framework
|
| 6 |
+
|
| 7 |
+
This project implements a Self-Supervised Learning (SSL) framework using the CIFAR-10 dataset and a ResNet-18 backbone. The goal of the project is to train a model to learn robust image representations without relying on labeled data. This framework utilizes contrastive learning with data augmentations and a custom contrastive loss function.
|
| 8 |
+
|
| 9 |
+
---
|
| 10 |
+
|
| 11 |
+
## **Features**
|
| 12 |
+
**Data Augmentation**:
|
| 13 |
+
|
| 14 |
+
- Random cropping, flipping, color jitter, grayscale conversion, Gaussian blur, and normalization.
|
| 15 |
+
|
| 16 |
+
**Backbone Architecture**:
|
| 17 |
+
|
| 18 |
+
- ResNet-18 with a custom projection head.
|
| 19 |
+
|
| 20 |
+
**Contrastive Learning**:
|
| 21 |
+
|
| 22 |
+
- Contrastive loss function with positive and negative pair sampling.
|
| 23 |
+
|
| 24 |
+
**Optimization**:
|
| 25 |
+
|
| 26 |
+
- Gradient clipping and weight decay for numerical stability.
|
| 27 |
+
|
| 28 |
+
**Model Checkpointing**:
|
| 29 |
+
|
| 30 |
+
- Save model weights at the end of each epoch.
|
| 31 |
+
|
| 32 |
+
|
| 33 |
+
## **How It Works**
|
| 34 |
+
1. **Data Augmentation**:
|
| 35 |
+
- Two augmented views of each image are created for contrastive learning.
|
| 36 |
+
|
| 37 |
+
2. **Contrastive Loss**:
|
| 38 |
+
- Positive pairs: Augmented views of the same image.
|
| 39 |
+
- Negative pairs: Augmented views of different images.
|
| 40 |
+
- Loss is computed using the similarity of positive pairs while minimizing similarity with negative pairs.
|
| 41 |
+
|
| 42 |
+
3. **Optimization**:
|
| 43 |
+
- The model uses the Adam optimizer with a learning rate of `3e-4` and weight decay of `1e-4`.
|
| 44 |
+
- Gradient clipping ensures numerical stability.
|
| 45 |
+
|
| 46 |
+
---
|
| 47 |
+
|
| 48 |
+
## **Results and Evaluation**
|
| 49 |
+
- **Training Loss**:
|
| 50 |
+
- Observe the training loss decreasing across epochs, indicating successful representation learning.
|
| 51 |
+
- **Downstream Tasks**:
|
| 52 |
+
- Evaluate the learned embeddings on classification or clustering tasks.
|
| 53 |
+
|
| 54 |
+
---
|
| 55 |
+
|
| 56 |
+
## **Acknowledgments**
|
| 57 |
+
- CIFAR-10 dataset: https://www.cs.toronto.edu/~kriz/cifar.html
|
| 58 |
+
- PyTorch: https://pytorch.org/
|
| 59 |
+
- ResNet-18 architecture.
|
| 60 |
+
|
| 61 |
+
---
|
| 62 |
+
|