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Self-Driving Car Behavioral Cloning

Overview

This is a full self-driving car behavioral cloning using End-to-End Learning approach and Computer Vision in Udacity Self-Driving Car simulator.

This project is a tiny implementation of NVIDIA End-to-End self-driving cars paper [1]

End-to-End Architecture - NVIDIA

The system relies on a single Convolutional Neural Network (CNN) which takes visual data from cameras as input, and computes the steering command to drive the car.

Requirements & Environment Setup

Dependency installation

pip install -r requirements.txt

Udacity Self-Driving Car simulator

The simulator communicates with the control/drive module bidirectionally, using a client-server architecture. The simulator is the server, and the control/drive module is the client.

Please refer to the official installation repo for guidelines.

Data collection & training

Start the udacity self-driving car Simulator

We have two modes:

  1. Training Mode: generates raw datas based on the driving examples and scenarios to fit the model

  1. Autonomous Mode: we use the model to drive the car autonomously

You can also choose the type of track the car will be driving on: flat or rougher

Dataset Format

After collecting the training data the simulator generates an IMG folder containing the images of the driving scene/environment and a driving_log.csv file mapped in the following form:

center camera img left camera img right camera img steering throttle break speed
center_img_frame1.jpg left_img_frame1.jpg right_img_frame1.jpg 0 0 0 0
... ... ... ... ... ... ...
center_img_frame_n.jpg left_img_frame_n.jpg right_img_frame_n.jpg NA NA NA NA

This is because the car has 3 cameras: front left, front right and windshield camera

Convolutional Neural Network (CNN) Implementation, Training and Testing

The implementation, training and testing of the ConvNet is covered in this notebook.

Application

Behavioral cloning is a type of imitation learning and offers many benefits when it comes to develop autonomous systems:

  • learn directly from human demonstrations based on large amount real world collected data
  • replay logging datas for debugging
  • test unsual driving scenarios, system limitations
  • training large amounts of unlabeled data

Usage

  • Start the simulator in autonomous mode
  • execute the following command to start driving!
python main.py

Notice: the training data was mainly collected in flat track mode, there still some improvement to be done to increase the model accuracy.

Expected Results

At the start the streering angle and throttle control commands are set to zero. After the communication with server is established the self-driving car increase its speed gradually.

Contributing

If you want to help this project grow, feel free to submmit a PR or open an issue in case you encounter a problem running the project.

Future upgrades

- collect data in the rougher track
- increase model accuracy for rougher tracks
- add logger module

References

"As soon as it works, no one calls it AI anymore."

— John McCarthy (AI effect)