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FADNet: A Fast and Accurate Network for Disparity Estimation

This repository will be not actively updated since we have develop an evolutional version "FADNet++". Please refer to the newer project. However, one can also use the "main" branch of this project to reproduce the experimental results.

This repository contains the code (in PyTorch) for "FADNet" paper, which has been accepted by IEEE International Conference on Robotics and Automation 2020 (ICRA 2020).

Contents

1. Introduction
2. Usage
3. Results
4. Acknowledgement
5. Contacts

Introduction

We propose an efficient and accurate deep network for disparity estimation named FADNet with three main features:

• It exploits efficient 2D based correlation layers with stacked blocks to preserve fast computation.
• It combines the residual structures to make the deeper model easier to learn.
• It contains multi-scale predictions so as to exploit a multi-scale weight scheduling training technique to improve the accuracy.

Usage

Dependencies

• Python3.6+
• PyTorch(1.6.0+)
• torchvision 0.5.0+
• KITTI Stereo
• Scene Flow

Package Installation

• Execute "sh compile.sh" to compile libraries needed by GANet.
• Enter "layers_package" and execute "sh install.sh" to install customized layers, including Channel Normalization layer and Resample layer.

We also release the docker version of this project, which has been configured completely and can be used directly. Please refer to this website for the image.

Usage of Scene Flow dataset
Download RGB cleanpass images and its disparity for three subset: FlyingThings3D, Driving, and Monkaa. Organize them as follows:
- FlyingThings3D_release/frames_cleanpass
- FlyingThings3D_release/disparity
- driving_release/frames_cleanpass
- driving_release/disparity
- monkaa_release/frames_cleanpass
- monkaa_release/disparity
Put them in the data/ folder (or soft link). The *train.sh* defaultly locates the data root path as data/.

Train

We use template scripts to configure the training task, which are stored in exp_configs. One sample "fadnet.conf" is as follows:

net=fadnet
loss=loss_configs/fadnet_sceneflow.json
outf_model=models/${net}-sceneflow
logf=logs/${net}-sceneflow.log

lr=1e-4
devices=0,1,2,3
dataset=sceneflow
trainlist=lists/SceneFlow.list
vallist=lists/FlyingThings3D_release_TEST.list
startR=0
startE=0
batchSize=16
maxdisp=-1
model=none
#model=fadnet_sceneflow.pth

We have integrated PSMNet and GANet for comparison. The sample configuration files are also given.

To start training, use the following command, dnn=CONFIG_FILE sh train.sh, such as:

dnn=fadnet sh train.sh

You do not need the suffix for CONFIG_FILE.

Evaluation

We have two modes for performance evaluation, test and detect, respectively. test requires that the testing samples should have ground truth of disparity and then reports the average End-point-error (EPE). detect does not require any ground truth for EPE computation. However, detect stores the disparity maps for each sample in the given list.

For the test mode, one can revise test.sh and run sh test.sh. The contents of test.sh are as follows:

net=fadnet
maxdisp=-1
dataset=sceneflow
trainlist=lists/SceneFlow.list
vallist=lists/FlyingThings3D_release_TEST.list

loss=loss_configs/test.json
outf_model=models/test/
logf=logs/${net}_test_on_${dataset}.log

lr=1e-4
devices=0,1,2,3
startR=0
startE=0
batchSize=8
model=models/fadnet.pth
python main.py --cuda --net $net --loss $loss --lr $lr \
               --outf $outf_model --logFile $logf \
               --devices $devices --batch_size $batchSize \
               --trainlist $trainlist --vallist $vallist \
               --dataset $dataset --maxdisp $maxdisp \
               --startRound $startR --startEpoch $startE \
               --model $model 

Most of the parameters in test.sh are similar to training. However, you can just ignore parameters, including trainlist, loss, outf_model, since they are not used in the test mode.

For the detect mode, one can revise detect.sh and run sh detect.sh. The contents of detect.sh are as follows:

net=fadnet
dataset=sceneflow

model=models/fadnet.pth
outf=detect_results/${net}-${dataset}/

filelist=lists/FlyingThings3D_release_TEST.list
filepath=data

CUDA_VISIBLE_DEVICES=0 python detecter.py --model $model --rp $outf --filelist $filelist --filepath $filepath --devices 0 --net ${net} 

You can revise the value of outf to change the folder that stores the predicted disparity maps.

Finetuning on KITTI datasets and result submission

We re-use the codes in PSMNet to finetune the pretrained models on KITTI datasets and generate disparity maps for submission. Use finetune.sh and submission.sh to do them respectively.

Pretrained Model

Update: 2020/2/6 We released the pre-trained Scene Flow model.

Results

Results on Scene Flow dataset

Citation

If you find the code and paper is useful in your work, please cite our conference paper

@inproceedings{wang2020fadnet,
  title={{FADNet}: A Fast and Accurate Network for Disparity Estimation},
  author={Wang, Qiang and Shi, Shaohuai and Zheng, Shizhen and Zhao, Kaiyong and Chu, Xiaowen},
  booktitle={2020 {IEEE} International Conference on Robotics and Automation ({ICRA} 2020)},
  pages={101--107},
  year={2020}
}

Acknowledgement

We acknowledge the following repositories and papers since our project has used some codes of them.

• PSMNet from Jia-Ren Chang
• GANet from Feihu Zhang
• PWCNet from NVIDIA Research Projects

Contacts

qiangwang@comp.hkbu.edu.hk

Any discussions or concerns are welcomed!