LaneNet-Lane-Detection

Use tensorflow to implement a Deep Neural Network for real time lane detection mainly based on the paper "Towards End-to-End Lane Detection: an Instance Segmentation Approach".You can refer to their paper for details https://arxiv.org/abs/1802.05591. This model consists of a encoder-decoder stage, binary semantic segmentation stage and instance semantic segmentation using discriminative loss function for real time lane detection task.

Installation

This software has only been tested on ubuntu 16.04(x64), python3.5, cuda-8.0, cudnn-6.0 with a GTX-1070 GPU. To install this software you need tensorflow 1.3.0 and other version of tensorflow has not been tested but I think it will be able to work properly in tensorflow above version 1.0. Other required package you may install them by

pip3 install -r requirements.txt

Test model

In this repo I uploaded a model trained on tusimple lane dataset Tusimple_Lane_Detection. The deep neural network inference part can achieve around a 50fps which is similar to the description in the paper. But the input pipeline I implemented now need to be improved to achieve a real time lane detection system. You can test a single image on the trained model as follows

python tools/test_lanenet.py --is_batch False --batch_size 1 
--weights_path model/tusimple_lanenet/tusimple_lanenet_vgg_2018-05-21-11-11-03.ckpt-94000 
--image_path data/tusimple_test_image/0.jpg

The results are as follows:

Test Input Image

Test Lane Mask Image

Test Lane Binary Segmentation Image

Test Lane Instance Segmentation Image

Test Lane Instance Embedding Image

If you want to test the model on a whole dataset you may call

python tools/test_lanenet.py --is_batch True --batch_size 2 --save_dir data/tusimple_test_image/ret 
--weights_path model/tusimple_lanenet/tusimple_lanenet_vgg_2018-05-21-11-11-03.ckpt-94000 
--image_path data/tusimple_test_image/

If you set the save_dir argument the result will be saved in that folder or the result will not be saved but be displayed during the inference process holding on 3 seconds per image. I test the model on the whole tusimple lane detection dataset and make it a video. You may catch a glimpse of it bellow. Tusimple test dataset gif

Train your own model

Data Preparation

Firstly you need to organize your training data refer to the data/training_data_example folder structure. And you need to generate a train.txt and a val.txt to record the data used for training the model.

The training samples are consist of three components. A binary segmentation label file and a instance segmentation label file and the original image. The binary segmentation use 255 to represent the lane field and o for the rest. The instance use different pixel value to represent different lane field and 0 for the rest.

All your training image will be scaled into the same scale according to the config file.

Train model

In my experiment the training epochs are 94000, batch size is 4, initialized learning rate is 0.0001 and decrease by multiply 0.96 every 5000 epochs. About training parameters you can check the global_configuration/config.py for details. You can switch --net argument to change the base encoder stage. If you choose --net vgg then the vgg16 will be used as the base encoder stage and a pretrained parameters will be loaded and if you choose --net dense then the dense net will be used as the base encoder stage instead and no pretrained parameters will be loaded. And you can modified the training script to load your own pretrained parameters or you can implement your own base encoder stage. You may call the following script to train your own model

python tools/train_lanenet.py --net vgg --dataset_dir data/training_data_example/

You can also continue the training process from the snapshot by

python tools/train_lanenet.py --net vgg --dataset_dir data/training_data_example/ --weights_path path/to/your/last/checkpoint

You may monitor the training process using tensorboard tools

During my experiment the Total loss drops as follows:

The Binary Segmentation loss drops as follows:

The Instance Segmentation loss drops as follows:

Experiment

The accuracy during training process rises as follows:

TODO

• Add a embedding visualization tools to visualize the embedding feature map
• Add detailed explanation of training the components of lanenet separately.
• Training the model on different dataset