Dataset splits manual configuration clarification?

[ego-thales]

Hi everyone,

I tried configuring my dataset splits manually following this tutorial for my dataset.

I used the following in README.md:

---
license: mit
configs:
- config_name: default
  data_files:
  - split: train
    path: "train/*.png"
  - split: calibration
    path: "calibration/*.png"
  - split: test
    path: "test/*.png"
---

The dataset file stricture is:

.
├── calibration/
├── README.md
├── test/
└── train/

I get:

The dataset viewer is not available because its heuristics could not detect any supported data files. You can try uploading some data files, or configuring the data files location manually.

Can anyone help me understand whether I fail to interpret the documentation or it would require clarification?

Thanks in advance!