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PAMTRI: Pose-Aware Multi-Task Learning for Vehicle Re-Identification

This repo contains the official PyTorch implementation of PAMTRI: Pose-Aware Multi-Task Learning for Vehicle Re-Identification Using Highly Randomized Synthetic Data, ICCV 2019.

[Paper] [Poster]

Introduction

We address the problem of vehicle re-identification using multi-task learning and embeded pose representations. Since manually labeling images with detailed pose and attribute information is prohibitive, we train the network with a combination of real and randomized synthetic data.

The proposed framework consists of two convolutional neural networks (CNNs), which are shown in the figure below. Top: The pose estimation network is an extension of high-resolution network (HRNet) for predicting keypoint coordinates (with confidence/visibility) and generating heatmaps/segments. Bottom: The multi-task network uses the embedded pose information from HRNet for joint vehicle re-identification and attribute classification.

Illustrating the architecture of PAMTRI

Getting Started

Environment

The code was developed and tested with Python 3.6 on Ubuntu 16.04, using a NVIDIA GeForce RTX 2080 Ti GPU card. Other platforms or GPU card(s) may work but are not fully tested.

Code Structure

Please refer to the README.md in each of the following directories for detailed instructions.

PoseEstNet directory: The modified version of HRNet for vehicle pose estimation. The code for training and testing, keypoint labels, and pre-trained models are provided.
MultiTaskNet directory: The multi-task network for joint vehicle re-identification and attribute classification using embedded pose representations. The code for training and testing, attribute labels, predicted keypoints, and pre-trained models are provided.

References

Please cite these papers if you use this code in your research:

@inproceedings{Tang19PAMTRI,
  author = {Zheng Tang and Milind Naphade and Stan Birchfield and Jonathan Tremblay and William Hodge and Ratnesh Kumar and Shuo Wang and Xiaodong Yang},
  title = { {PAMTRI}: {P}ose-aware multi-task learning for vehicle re-identification using highly randomized synthetic data},
  booktitle = {Proc. of the International Conference on Computer Vision (ICCV)},
  pages = {211-–220},
  address = {Seoul, Korea},
  month = oct,
  year = 2019
}

@inproceedings{Tang19CityFlow,
  author = {Zheng Tang and Milind Naphade and Ming-Yu Liu and Xiaodong Yang and Stan Birchfield and Shuo Wang and Ratnesh Kumar and David Anastasiu and Jenq-Neng Hwang},
  title = {City{F}low: {A} city-scale benchmark for multi-target multi-camera vehicle tracking and re-identification},
  booktitle = {Proc. of the Conference on Computer Vision and Pattern Recognition (CVPR)},
  pages = {8797–-8806},
  address = {Long Beach, CA, USA},
  month = jun,
  year = 2019
}

License

Code in the repository, unless otherwise specified, is licensed under the NVIDIA Source Code License.

Contact

For any questions please contact Zheng (Thomas) Tang.