This assignment is due on Friday, May 19 2023 at 11:59pm PST.

Starter code containing Colab notebooks can be downloaded here.

• Setup
• Goals
• Q1: Image Captioning with Vanilla RNNs
• Q2: Image Captioning with Transformers
• Q3: Generative Adversarial Networks
• Q4: Self-Supervised Learning for Image Classification
• Extra Credit: Image Captioning with LSTMs
• Submitting your work

Setup

Please familiarize yourself with the recommended workflow before starting the assignment. You should also watch the Colab walkthrough tutorial below.

Note. Ensure you are periodically saving your notebook (File -> Save) so that you don’t lose your progress if you step away from the assignment and the Colab VM disconnects.

Once you have completed all Colab notebooks except collect_submission.ipynb, proceed to the submission instructions.

Goals

In this assignment, you will implement language networks and apply them to image captioning on the COCO dataset. Then you will train a Generative Adversarial Network to generate images that look like a training dataset. Finally, you will be introduced to self-supervised learning to automatically learn the visual representations of an unlabeled dataset.

The goals of this assignment are as follows:

• Understand and implement RNN and Transformer networks. Combine them with CNN networks for image captioning.
• Understand how to train and implement a Generative Adversarial Network (GAN) to produce images that resemble samples from a dataset.
• Understand how to leverage self-supervised learning techniques to help with image classification tasks.

You will use PyTorch for the majority of this homework.

Q1: Image Captioning with Vanilla RNNs

The notebook RNN_Captioning.ipynb will walk you through the implementation of vanilla recurrent neural networks and apply them to image captioning on COCO.

Q2: Image Captioning with Transformers

The notebook Transformer_Captioning.ipynb will walk you through the implementation of a Transformer model and apply it to image captioning on COCO.

For MultiHeadAttention class in Transformer_Captioning.ipynb notebook, you are expected to apply dropout to the attention weights.

Q3: Generative Adversarial Networks

In the notebook Generative_Adversarial_Networks.ipynb you will learn how to generate images that match a training dataset and use these models to improve classifier performance when training on a large amount of unlabeled data and a small amount of labeled data. When first opening the notebook, go to Runtime > Change runtime type and set Hardware accelerator to GPU.

Q4: Self-Supervised Learning for Image Classification

In the notebook Self_Supervised_Learning.ipynb, you will learn how to leverage self-supervised pretraining to obtain better performance on image classification tasks. When first opening the notebook, go to Runtime > Change runtime type and set Hardware accelerator to GPU.

Extra Credit: Image Captioning with LSTMs

The notebook LSTM_Captioning.ipynb will walk you through the implementation of Long-Short Term Memory (LSTM) RNNs and apply them to image captioning on COCO.

Submitting your work

Important. Please make sure that the submitted notebooks have been run and the cell outputs are visible.

Once you have completed all notebooks and filled out the necessary code, there are two steps you must follow to submit your assignment:

Even if you have completed your notebooks locally, please execute the following PDF generation on Colab. This will prevent a lot of headaches installing xelatex locally, specifically on Windows or Mac OS.

1. Open collect_submission.ipynb in Colab and execute the notebook cells.

This notebook/script will:

• Generate a zip file of your code (.py and .ipynb) called a3_code_submission.zip.
• Convert all notebooks into a single PDF file.

If your submission for this step was successful, you should see the following display message:

### Done! Please submit a3_code_submission.zip and the a3_inline_submission.pdf to Gradescope. ###

2. Submit the PDF and the zip file to Gradescope.

Remember to download a3_code_submission.zip and a3_inline_submission.pdf locally before submitting to Gradescope.