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SdSandbox

Self Driving Car Sandbox

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Summary

Use Unity 3d game engine to simulate car physics in a 3d world. Generate image steering pairs to train a neural network. Uses comma ai training code with NVidia NN topology. Then validate the steering control by sending images to your neural network and feed steering back into the simulator to drive.

Some videos to help you get started

Training your first network

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World complexity

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Creating a robust training set

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Setup

You need to have Unity installed, and all python modules listed in the Requirements section below.

For the impatient ( I just want to see this work )

  1. Start the prediction server with the pre-trained model.
cd sdsandbox/src
python predict_server.py usc

  1. Load the Unity project sdsandbox/sdsim in Unity. Double click on Assets/Scenes/UnityStandardCar to open that scene.

  2. Hit the start button to launch. Then the "Use NN Steering".

#To create your own data and train

Generate training data

  1. Load the Unity project sdsandbox/sdsim in Unity.

  2. Create a dir sdsandbox/sdsim/log.

  3. Hit the start arrow in Unity to launch project.

  4. Hit button "Generate Training Data" to generate image and steering training data. See sdsim/log for output files.

  5. Stop Unity sim by clicking run arrow again.

  6. Run this python script to prepare raw data for training:

cd sdsandbox/src
python prepare_data.py --clean
  1. Repeat 4, 5, 6 until you have lots of training data. 30gb+ is good. On your last run, prepare a validation set:
python prepare_data.py --validation --clean

Train Neural network

python train.py mymodel

Let this run. It may take 12+ hours if running on CPU.

Run car with NN

  1. Start the prediction server. This listens for images and returns a steering result.
python predict_server.py mymodel

  1. Start Unity project sdsim

  2. Push button "Use NN Steering"

Requirements

python 2.7 64 bit
tensorflow-0.9
keras-1.0.6
h5
pillow
Unity 5.5+

Credits

Tawn Kramer, Riccardo Biasini, George Hotz, Sam Khalandovsky, Eder Santana, and Niel van der Westhuizen