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SysCV / shift-dev

SHIFT Dataset DevKit - CVPR2022
https://www.vis.xyz/shift
MIT License
101 stars 10 forks source link

How to download the night data only? #5

Closed xukuanHIT closed 2 years ago

xukuanHIT commented 2 years ago

Hi, thank you for the great dataset. I find the dataset includes the night data on the homepage, may I know how to download the dataset at night or dusk only?

mattiasegu commented 2 years ago

Hi @xukuanHIT, I'm glad you like our work!

Yes, it is correct that our dataset includes night sequences. However, it is not possible to download night sequences only. To allow that we would have to split the folders into e.g. daytime, dawn/dusk, night, cloudy, rainy, ... Unfortunately, this is not possible as our domain shifts happen along different directions (time of day, rain strength, fog strength, cloudiness, ..." and some e.g. night sequences can also be collected in rainy conditions. Such a folder structure would thus create some duplicate sequences across the different domain folders.

We thus recommend you to download the dataset with the view that you would like to use, e.g. front view, and the annotations that you would like to use, e.g. 2D object detection. The file discrete/images/val/front/det_2d.json would then contain the annotations stored in the Scalabel format. As such, you can then filter every sequence and frame based on their attributes field -which contains the weather parameters - and use the night sequences only.

Moreover, to facilitate ease of use we will also provide a json file containing only the weather parameters for each sequence.

Please let me know if you have any follow-up questions :)

xukuanHIT commented 2 years ago

OK, thanks a lot. I will have a try.