The dataset is distributed in two formats – PNG/JSON with Python loader and Caltech Pedestrians compatible (MATLAB loader). We also provide SDK for both formats.



PNG/JSON (Python)

Training images (135GB) Training annotations (32MB)
Validation images (50GB) Validation annotations (10MB)
Test images (100GB) Test image ids (useful if you want to use continuous image sequences, otherwise not needed) (14MB)

Caltech Pedestrians compatible (MATLAB)

Training images (121GB) Training annotations (1.2MB)
Validation images (49GB) Validation annotations (300kB)
Test images (100GB)

Dataset privacy notice

For privacy issues with the dataset, please refer to our Dataset Privacy Notice.


This dataset is made freely available to academic and non-academic entities for non-commercial purposes such as academic research, teaching, scientific publications, or personal experimentation. Permission is granted to use the data given that you agree:

  1. That the dataset comes “AS IS”, without express or implied warranty. Although every effort has been made to ensure accuracy, we (University of Oxford) do not accept any responsibility for errors or omissions.
  2. That you include a reference to the Nightowls Dataset in any work that makes use of the dataset.
  3. That you do not distribute this dataset or modified versions. It is permissible to distribute derivative works in as far as they are abstract representations of this dataset (such as models trained on it or additional annotations that do not directly include any of our data) and do not allow to recover the dataset or something similar in character.
  4. You may not use the dataset or any derivative work for commercial purposes such as, for example, licensing or selling the data, or using the data with a purpose to procure a commercial gain.
  5. That all rights not expressly granted to you are reserved by us (University of Oxford).


Please cite

  title={NightOwls: A pedestrians at night dataset},
  author={Neumann, Luk{\'a}{\v{s}} and Karg, Michelle and Zhang, Shanshan and Scharfenberger, Christian and Piegert, Eric and Mistr, Sarah and Prokofyeva, Olga and Thiel, Robert and Vedaldi, Andrea and Zisserman, Andrew and Schiele, Bernt},
  booktitle={Asian Conference on Computer Vision},