STRIDE: Street View-based Environmental Feature Detection and Pedestrian Collision Prediction

ICCVW 2023

Cristina Gonzalez^* Nicolás Ayobi^*, Felipe Escallon, Laura Baldovino-Chiquillo, Maria Wilches-Mogollón, Donny Pasos, Nicole Ramírez, Jose Pinzón, Olga L Sarmiento, D. Alex Quistberg, Pablo Arbeláez

^*Co-Main Authors, Equal contribution.

• Best Student Paper Award at the ROAD++ Workshop of Situation Awareness in Autonomous Driving.
  Hosted at the International Conference in Computer Vision (ICCV) 2023. Proceedings available at IEEE Xplore
  
• Preprint available at arXiv
  

This paper introduces a novel benchmark to study the impact and relationship of built environment elements on pedestrian collision prediction, intending to enhance environmental awareness in autonomous driving systems to prevent pedestrian injuries actively. We introduce a built environment detection task in large-scale panoramic images and a detection-based pedestrian collision frequency prediction task. We propose a baseline method that incorporates a collision prediction module into a state-of-the-art detection model to tackle both tasks simultaneously. Our experiments demonstrate a significant correlation between object detection of built environment elements and pedestrian collision frequency prediction. Our results are a stepping stone towards understanding the interdependencies between built environment conditions and pedestrian safety.

This repository provides instructions to download the STRIDE dataset and run the PyTorch implementation of the STRIDE baseline, both presented in the paper STRIDE: Street View-based Environmental Feature Detection and Pedestrian Collision Prediction.

STRIDE Dataset

Please download our Environmental Feature Detection and Pedestrian Collisions annotations from this link using the following command:

$ wget -r http://157.253.243.19/STRIDE/

You can also download the data from this Google Drive. There, you will find the bounding box annotations in COCO JSON format, a CSV with the number of pedestrian collisions associated with each image, and the list of panorama IDs of our selected images. The panoramic images must be downloaded directly from the Google Street View service using the provided list of Panorama IDs. You can use our download_images.py script as an example of how to download images.

$ pip install streetview

$ python download_panoramas.py --ids_file_path path/to/Panorama_IDs/file --images_save_path path/to/output/directory \
  --num_processes <number of parallel jobs (according to your internet and cpu resources)> --percentage <percentage of the data to download [0.0 - 1.0]> \
  --dont_preprocess (avoid removing top and bottom artifacts)

You may also use the Google Street View app or use this Google Street View GitHub repository. Please remember that we modified the original Google Street View panoramic images by removing 1000 pixels from the top and 1656 pixels from the bottom to remove artifacts from panoramic image formation, just as you can see in the download_images.py script.

If you encounter difficulties downloading the data, such as images that are unavailable for download in Google Streetview or similar, feel free to email n.ayobi@uniandes.edu.co and ask for the dataset.

STRIDE Baseline

Our code is mainly based on the original DINO repo. Please check their code and paper for any further details.

Installation

Please follow these steps to install the required dependencies to run our STRIDE baseline:

$ conda create --name stride python=3.7.3 -y
$ conda activate stride
$ conda install pytorch==1.9.0 torchvision==0.10.0 cudatoolkit=11.1 -c pytorch -c nvidia

$ git clone https://github.com/BCV-Uniandes/STRIDE
$ cd STRIDE
$ pip install -r requirements.txt

$ cd models/dino/ops
$ python setup.py build install
$ python test.py
$ cd ../../..

Data Preparation

Please download all panoramic images with the provided list of Panorama IDs and the data, as explained previously. Please locate the images in a directory named images and the files in a directory named annotations and indicate the path to this directory with the coco_path argument.

Then, please download our pretrained models from the data link, and indicate the path to the model with the pretrain_model_path argument.

Run the code

We have provided default bash scripts with the parameters to run our code. Please use these scripts to train and evaluate our model as follows:

# Train for built environment feature detection
$ sh scripts/STRIDE_train_detection_dist.sh

# Train for pedestrian collision prediction
$ sh scripts/STRIDE_train_regression_dist.sh

# Test both tasks
$ sh scripts/STRIDE_eval_dist.sh

Contact

Feel free to contact n.ayobi@uniandes.edu.co for any questions or information.

Citing STRIDE

@InProceedings{gonzalez-ayobi2023stride,
    author={González, Cristina and Ayobi, Nicolás and Escallón, Felipe and Baldovino-Chiquillo, Laura and Wilches-Mogollón, Maria and Pasos, Donny and Ramírez, Nicole and Pinzón, Jose and Sarmiento, Olga and Quistberg, D. Alex and Arbeláez, Pablo},
    booktitle={2023 IEEE/CVF International Conference on Computer Vision Workshops (ICCVW)}, 
    title={STRIDE: Street View-based Environmental Feature Detection and Pedestrian Collision Prediction}, 
    year={2023},
    pages={3222-3234},
    keywords={Visualization;Pedestrians;Transportation;Benchmark testing;Predictive models;Feature extraction;Frequency estimation;Autonomous Driving;Pedestrian Safety;Collision Prediction;Situational Awareness;Panoramic Images},
    doi={10.1109/ICCVW60793.2023.00347}
}