Classifying MNIST from scratch.

This is code that classifies the MNIST dataset, which is a dataset of 50,000 handwritten digits. I used a deep neural network with layers sizes 784, 684, 584, 484, 392, 100, 10. I use sigmoid for activation functions, but have experimented with relu.
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Table of Contents

1. About The Project
   • Built With
2. Getting Started
   • Prerequisites
   • Installation
3. Usage
4. Roadmap
5. Contributing
6. License
7. Contact
8. Acknowledgments

About The Project

I watched 3b1b's video. I thought that was really cool, so I tried to do it from scratch. Pretty much, this program takes the brightness value of each pixel of the written digit, flattens the 28x28 image into a 784 element vector, and uses that as an input into a neural network. Then, we feedforward and backpropagate.
I was also learning rust at the time, so I did it in rust! It was a good learning experience for both rust learning and neural network theory. When I got stuck, or my net seemed like it was just guessing, I got tips from my friend jun. He let me use his dads lecture notes which helped, and sauced me a page of differentials for the backpropagation. This was really fun to develop. I had to get the dataset in rust though, and that was hard. That is what getData.py is for. I parse the pkl file into a json, and then rust can read the json.

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Built With

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Getting Started

Everything is in the crate!

well, almost everything.

Prerequisites

• You first need to install rust, see the documentation
• for our parsing tool, you will need these dependencies:
  • gzip
  • pickle
  • matplotlib
  • numpy
• Additionally, if you want to run the pytorch solution to MNIST, you will obviously need torch

Installation

1. Clone the repo

   git clone https://github.com/Sentientplatypus/digit-recognition-dnn.git

2. Run the crate with

   cargo run

3. Additional requirements based upon your needs as mentioned in the previous section.

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Usage

To load the dataset, you will need to create a new Dataset with the Dataset::generate_full(file_path:String).

The network architecture is stored in a Network struct. The Network aggregates the Layer struct. The Layer struct aggregates Neuron. For running, you can create a new instance of Network with Network::new(). where you can pass in the layer sizes as an array, and whether it is binary output or not.

You can run the training through the Network.sgd() method. A gui like this should pop up.

After your training, you can choose to save your network parameters with the Network.to_file(path:String) method.

For more examples, please refer to the main.rs file

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Roadmap

• Create classes and research
• Binary Classification
• Multiclassification
  • Softmax + Cross Entropy Loss

See the open issues for a full list of proposed features (and known issues).

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Contributing

Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are greatly appreciated.

If you have a suggestion that would make this better, please fork the repo and create a pull request. You can also simply open an issue with the tag "enhancement". Don't forget to give the project a star! Thanks again!

1. Fork the Project
2. Create your Feature Branch (git checkout -b feature/AmazingFeature)
3. Commit your Changes (git commit -m 'Add some AmazingFeature')
4. Push to the Branch (git push origin feature/AmazingFeature)
5. Open a Pull Request

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Contact

Geneustace Wicaksono - My Website - geneustacewicaksono@yahoo.com

Project Link: https://github.com/Sentientplatypus/digit-recognition-dnn

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Acknowledgments

• Junyoung Sim

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