| # Prepare datasets | |
| If you have a dataset directory, you could use os environment variable named `YOLOX_DATADIR`. Under this directory, YOLOX will look for datasets in the structure described below, if needed. | |
| ``` | |
| $YOLOX_DATADIR/ | |
| COCO/ | |
| ``` | |
| You can set the location for builtin datasets by | |
| ```shell | |
| export YOLOX_DATADIR=/path/to/your/datasets | |
| ``` | |
| If `YOLOX_DATADIR` is not set, the default value of dataset directory is `./datasets` relative to your current working directory. | |
| ## Expected dataset structure for [COCO detection](https://cocodataset.org/#download): | |
| ``` | |
| COCO/ | |
| annotations/ | |
| instances_{train,val}2017.json | |
| {train,val}2017/ | |
| # image files that are mentioned in the corresponding json | |
| ``` | |
| You can use the 2014 version of the dataset as well. | |