Domain-Adaptive Object Detection via Uncertainty-Aware Distribution Alignment

Multi-level Entropy Attention Alignment (MEAA) is an end-to-end approach for unsupervised domain adaptation of object detector. Specifically, MEAA consists of two main components:

(1) Local Uncertainty Attentional Alignment (LUAA) module to accelerate the model better perceiving structure-invariant objects of interest by utilizing information theory to measure the uncertainty of each local region via the entropy of the pixel-wise domain classifier

(2) Multi-level Uncertainty-Aware Context Alignment (MUCA) module to enrich domain-invariant information of relevant objects based on the entropy of multi-level domain classifiers

Setup Introduction

Follow faster-rcnn repository to setup the environment. When installing pytorch-faster-rcnn, you may encounter some issues. Many issues have been reported there to setup the environment. We used Pytorch 0.4.1 for this project. The different version of pytorch will cause some errors, which have to be handled based on each envirionment.

Tested Hardwards & Softwares

• GTX 1080

• Pytorch 0.4.1

• CUDA 9.2

  conda install pytorch=0.4.1 torchvision==0.2.1 cuda92 -c pytorch

• Before training:

  mkdir data
  cd lib
  sh make.sh (add -gencode arch=compute_70,code=sm_70" # added for GTX10XX)

• Note to set number of classes = 20 in lib/datasets/water.py

• Tensorboard tensorboard --logdir='your/path/here'

Data Preparation

• PASCAL_VOC 07+12: Please follow the instructions in py-faster-rcnn to prepare VOC datasets.
• Clipart, WaterColor: Dataset preparation instruction link Cross Domain Detection .
• Sim10k: Website Sim10k
• CitysScape, FoggyCityscape: Download website Cityscape, see dataset preparation code in DA-Faster RCNN

All codes are written to fit for the format of PASCAL_VOC. For example, the dataset Sim10k is stored as follows.

$ cd Sim10k/VOC2012/
$ ls
Annotations  ImageSets  JPEGImages
$ cat ImageSets/Main/val.txt
3384827.jpg
3384828.jpg
3384829.jpg
.
.
.

If you want to test the code on your own dataset, arange the dataset in the format of PASCAL, make dataset class in lib/datasets/. and add it to lib/datasets/factory.py, lib/datasets/config_dataset.py. Then, add the dataset option to lib/model/utils/parser_func.py.

Data Path

Write your dataset directories' paths in lib/datasets/config_dataset.py.

Pretrained Model

We used two models pre-trained on ImageNet in our experiments, VGG and ResNet101. You can download these two models from:

• VGG16: Dropbox, VT Server

• ResNet101: Dropbox, VT Server

Download them and write the path in __C.VGG_PATH and __C.RESNET_PATH at lib/model/utils/config.py.

Train

• Cityscapes --> Foggy_cityscapes

  python trainval_net_MEAA.py --cuda --net vgg16 --dataset cityscape --dataset_t foggy_cityscape

  use tensorboard

  python trainval_net_MEAA.py --cuda --net vgg16 --dataset cityscape --dataset_t foggy_cityscape --use_tfb

  --use_tfb will enable tensorboard to record training results

Test

• Cityscapes --> Foggy_cityscapes

  python test_net_MEAA.py --cuda --net vgg16 --dataset foggy_cityscape --load_name models/vgg16/cityscape/*.pth

  Our trained model for foggy_cityscape: https://drive.google.com/file/d/17pDu7mrxtx4cbpV2HNCGm2fzqCM1BZqd/view?usp=sharing

• Results:

Reminder

For training "pascasl_voc_0712 -> water" results, since we only use 6 classes for evaluation. We need to calculate results manually. Just use chosen 6 classes to calculate mAP.

Demo

This function is under construction now.

python demo_global.py --net vgg16 --load_name models/vgg16/cityscape/*.pth --cuda --dataset cityscape

References

@inproceedings{10.1145/3394171.3413553,
author = {Nguyen, Dang-Khoa and Tseng, Wei-Lun and Shuai, Hong-Han},
title = {Domain-Adaptive Object Detection via Uncertainty-Aware Distribution Alignment},
year = {2020},
isbn = {9781450379885},
publisher = {Association for Computing Machinery},
address = {New York, NY, USA},
url = {https://doi.org/10.1145/3394171.3413553},
doi = {10.1145/3394171.3413553},
}