Name of validation folder for classification training (Export: Folder Structure)

Hi,

when exporting an image classification dataset from Roboflow as Folder Structure format with train/validation splits, the folder which contains validation images is automatically named valid. However, YOLOv5-cls training expects the validation folder to be named val (see here) and throws an error if there is only a valid folder (and no test split). I checked all Roboflow notebooks for classification training and in none of the training procedures a valid folder is actually used for validation.

If the default name for the validation split when exporting a dataset as Folder Structure format would be changed from valid to val, YOLOv5-cls classification training would work as expected, when no test split was created.

Thanks!

Beginne damit, den Folder Structure exporter nachzuverfolgen und seine Benennung des Validierungsverzeichnisses mit der Erwartung von YOLOv5s classify/train.py zu vergleichen. Als abgeschlossen gilt dies, wenn ein Export mit train- und validation-Splits, aber ohne test-Split, ein val-Verzeichnis erzeugt, das das YOLOv5-Klassifikationstraining verwenden kann.